Question

phân tích thành nhân tử
a)4x^2-12x+9-3(2x-3)(x+1)
b)25-42^2+8xy-4y^2
c)x^3-5x^2+4x-2(x^2-x)
d) 4(x-2)^2-5(x-2)+1
EM CẦN GẤP Ạ

 

Answer 1

a: \(4x^2-12x+9-3\left(2x-3\right)\left(x+1\right)\)

\(=\left(2x-3\right)^2-\left(2x-3\right)\left(3x+3\right)\)

\(=\left(2x-3\right)\left(2x-3-3x-3\right)\)

\(=-\left(x+6\right)\left(2x-3\right)\)

b: \(25-4x^2+8xy-4y^2\)

\(=25-\left(2x-2y\right)^2\)

\(=\left(5-2x+2y\right)\left(5+2x-2y\right)\)