Question

Answer 1

\(a,=\left(x+y\right)^2-9=\left(x+y+3\right)\left(x+y-3\right)\\ b,=x\left(2x^2-2x+7x-7\right)=x\left(x-1\right)\left(2x+7\right)\)

Answer 2

a: =(x+y-3)(x+y+3)

b: \(=x\left(2x^2+5x-7\right)\)

\(=x\left(2x+7\right)\left(x-1\right)\)

Answer 3

\(a.\left(x+y-3\right)\left(x+y+3\right)\)

\(b.x\left(x-1\right)\left(2x+7\right)\)

Answer 4

a/ (x+y-3) (x+y+3)

b/ x(2x+7) (x-1)