Question

(x-3)(x+7)

5x-5y

x^2-11x

x^2-6x+9

x^2-121x^2-3x+5x-5y

x^2+2xy+y^2-64

Answer 1

\(5x-5y=5\left(x-y\right)\\ x^2-11x=x\left(x-11\right)\\ x^2-6x+9=\left(x-3\right)^2\\ x^2+2xy+y^2-64=\left(x+y\right)^2-64=\left(x+y+8\right)\left(x+y-8\right)\)

2 câu còn lại sai đề rồi

Answer 2

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

\(x^2-11x=x\left(x-11\right)\)

\(x^2-6x+9=\left(x-3\right)^2\)

\(x^2+2xy+y^2-64=\left(x+y\right)^2-8^2=\left(x+y+8\right)\left(x+y-8\right)\)

Answer 3

Đề bài yêu cầu gì?