Da thuc t S6

2 1 4732 535 +++−= xxxxB Bµi tËp 2.   222 zyxP ++= 222 zyxQ +−= xy5xy-y5x 22 + 222 5x-xy xyy +  Bµi tËp 1:   ! "#   !$   %&!'#() 222 22222 22222 22222 x-2xyy5x x)()5(-5xyy5x 5x-xyxy5xy-y5x )5x-xy(xy)5xy-y(5x y yxyxyxy xyy xyy += −++++= +++= +++ 2 222222 222222 2 )()( y zyxzyx zyxzyxQP = −+−++= +−−++=− 2 1 736 2 1 73)42( 2 1 4732 35 355 535 ++−= ++−+= +++−= xxx xxxx xxxxB 2 1 4732 535 +++−= xxxxB Bµi tËp 2.   222 zyxP ++= 222 zyxQ +−= xy5xy-y5x 22 + 222 5x-xy xyy +  Bµi tËp 1:   ! "#   !$   %&!'#() * (+ ,# * -(+,#. * !/(+, xy5xy-y5x 22 + 222 5x-xy xyy + 222 zyx +− 222 zyx ++ 2 1 4732 535 +++−= xxxxB 1. Đa thức một biến 0"#1!/ 2,3 #4 .5 +!/) 0"#6789+9 +:#) ;:<7=> 0 2 1 2 1 x = Vậy mỗi số đợc coi là đa thức của một biến. *!/+? :@!/ 2 1 37 2 += yyA 2 1 4732 535 +++= xxxxB ABC >&;D +:# 0 . 2 1 2 1 y = 2 1 *>E%F8+# 8G#H *>E%F=+, ;) I1%J8G#H9#K 2;DL+8G2H1%J  =G,H 9  , K 3 ;D L  + =G3H 0"#8G2H=G3H  8GMH =G3H N 8G#H =G,H & %& 2 1 10 2 1 31.7 2 1 )1.(3)1.(7)1( 2 =++= +−−−=−A 2 1 242 2 1 2.42.72.32.2)2( 535 = +++−=B 2 1 160)5( = A 2 1 241)2( −=− B 1.§a thøc mét biÕn 2 1 4732)( 535 +++−= xxxxxB *LO  2 15325 52432 +−−+− xxxxx 133 535 +−+ xxx 3,3, x215 − 2 M 2 44 5 2M 3 22 3 P M P *P * , 4 Q2 1.§a thøc mét biÕn =R54%54STI 1.§a thøc mét biÕn 2. S¾p xÕp mét ®a thøc -  ,U V W   7  BC 3 STI <)4%53STI 0"#XR,R1=G,HY+Z# [6!) <)5 ! "#       G,H\G,H) 0"#E%F1(%1 G,H\G,H 53 553 535 x67x3x- 2 1 )4x2x(7x3x- 2 1 2 1 4x7x3x-2xB(x) ++= +++= +++= 2 1 +3x - 7x + 6x= B(x) 35 12x-5x )2x-2x-4x( 2x-12x-5x2x-4xQ(x) 2 333 3323 += == ++= 10-2x-x 10-2xx-)x3x-2x( x10-3x-2x2x-xR(x) 2 2444 4442 += ++= +++= IXR,R19]Y+^ [6!;D *BC!C2.STI%53 432 2636)( xxxxxP ++−+= 3662)( 234 ++−+= xxxxxP 432 2663)( xxxxxP ++−+= AY+^[_;D - !'# 1 XR ,R 1 9 ] )`&C>) *> XR ,R 1 9 ]  !/  %;NR6+!V) 1.§a thøc mét biÕn 2. S¾p xÕp mét ®a thøc 3. HÖ sè aU G,HKb, M Qc, 4 d4,Q 2 1 -,UVW%& -E%9]bËc cao nhÊt G,H) -E%9]P) -efSTI 12x-5x)( 2 +=xQ KMK3K2 10-2x-x)( 2 +=xR K2K3K2P * Ai ®óng?I6+!90; : g*( '+ch =9  g0 ( '  G,HLOR6+chfL Y!) 2 7x-xP(x) 3 += 1.§a thøc mét biÕn 2. S¾p xÕp mét ®a thøc 0(' LOR6+c 3. HÖ sè 1.§a thøc mét biÕn 2. S¾p xÕp mét ®a thøc 3. HÖ sè. 22946 22)45()3(6 624352)( 233 22333 33232 +−+−= +−+++−= +−−+−+= xxxx xxxxxx xxxxxxxP =iR4j%54STI 33232 624352)( xxxxxxxP +−−+−+= H XR,R19]  H A1(L1P G,H H V!G,H( 'G,H H0(+Z#[M+b 0(+Z#[4+5 0(+Z#[3+j 0(+Z#[2+3 0(<B+3 H=G,H+M 0('G,H+b 4. LuyÖn tËp. [...]...1.§a thøc m t biÕn 2 S¾p xÕp m t ®a thøc 3 HÖ sè 4 LuyÖn t p 5 H­íng dÉn vÒ nhµ N¾m c¸ch s¾p xÕp, kÝ hiÖu ®a thøc m t biÕn Bµi t p 40, 41, 42 trang 43 SGK; bµi 34, 35, 36 trang 14 SBT . P M P *P * , 4 Q2 1.§a thøc m t biÕn =R54%54STI 1.§a thøc m t biÕn 2. S¾p xÕp m t ®a thøc -  ,U V W   7  BC 3 STI <)4%53STI 0"#XR,R1=G,HY+Z# [6!) <)5 . thức m t biến 0"#1!/ 2,3 #4 .5 +!/) 0"#6789+9 +:#) ;:<7=> 0 2 1 2 1 x = Vậy mỗi số đợc coi là đa thức của m t biến. *!/+? :@!/ 2 1 37 2 += yyA 2 1 4732 535 +++= xxxxB ABC >&;D +:# 0 . 2 1 2 1 y = 2 1 .  G,HLOR6+chfL Y!) 2 7x-xP(x) 3 += 1.§a thøc m t biÕn 2. S¾p xÕp m t ®a thøc 0(' LOR6+c 3. HÖ sè 1.§a thøc m t biÕn 2. S¾p xÕp m t ®a thøc 3. HÖ sè. 22946 22)45()3(6 624352)( 233 22333 33232 +−+−= +−+++−= +−−+−+= xxxx xxxxxx xxxxxxxP =iR4j%54STI 33232 624352)(