Bài tập toán cơ bản số 31

Created by T Madas Question 20 Factorize each of the following quadratic expressions a) 3x − 17 x + 20 = ( 3x − )( x − ) b) x − 3x − = ( x − )( x + 1) c) x − x + = ( x − )( x − 1) d) 3x + 13x + 12 = ( 3x + )( x + 3) e) x − 15 x + 27 = ( x − )( x − 3) f) x − x − 10 = ( x + 5)( x − ) g) 3x − 13x + 14 = ( 3x − )( x − ) h) x + x − 18 = ( x − 3)( x + ) Created by T Madas Created by T Madas Question 21 Factorize each of the following quadratic expressions a) x + x − 30 = ( x − )( x + ) b) x + 11x − 30 = ( x + 15 )( x − ) c) x + x + = ( x + 1)( x + 3) d) x − 11x − = ( x + 1)( x − 3) e) x + x − 15 = ( x + )( x − 3) f) x − x − = ( x + 1)( x − ) g) x + x − = ( x + )( x − 3) h) x − x − = ( x − 5)( x + 1) Created by T Madas