Question

lm chi tiết

Answer 1

a) \(=7x\left(x+2y\right)\)

b) \(=3\left(x+4\right)-x\left(x+4\right)=\left(3-x\right)\left(x+4\right)\)

c) \(=\left(x-y\right)^2-z^2=\left(x-y-z\right)\left(x-y+z\right)\)

d) \(=\left(x-1\right)^2-16=\left(x-17\right)\left(x+15\right)\)