因式分解2(7-2X)^2-14X_数学解答

因式分解2(7-2X)^2-14X

人气：270 ℃　时间：2020-10-02 00:17:52

解答

2(7-2X)^2-14X
= 2[(7-2x)^2 - 7x]
= 2 [ 49 - 28x + 4x^2 - 7x ]
= 2 ( 49 - 35x + 4x^2 )
= 2(x-7)(4x-7)