giao an dai 7- 2 cot chuan
... =-5 +x 2 -4 x 3 +x 4 -x 6 -Q(x)= 1-x-x 2 +x 3 +x 4 -2 x 5 P(x)-Q(x) =-4 -x-3x 3 +2x 4 -2 x 4 -2 x 5 -x 6 Bài 52(46-sgk) P(x) =x 2 -2 x-8 P (-1 ) = (-1 ) 2 -2 (-1 )-8 =-5 P(0) = (0) 2 -2 (0 )-8 =-8 P(4) = (4) 2 -2 (4 )-8 ... 5x 2 +xyz-5xy+3-y M+N=(3xyz-3x 2 +5xy-1)+(5x 2 +xyz- 5xy+3-y) = 4xyz +2x 2 -y+2 M-N = (3xyz-3x 2 +5xy-1 )-( 5x 2 +xyz- 5xy...
Ngày tải lên: 26/10/2013, 05:11