Question

Answer 1

1) \(=2y\left(3x+5+8z\right)\)

2) \(=\left(x+3\right)\left(y-4\right)\)

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

Answer 2

\(a,=2y\left(3x+5+8z\right)\\ b,=\left(x+3\right)\left(y-4\right)\\ c,=\left(x-y\right)\left(x-y\right)=\left(x-y\right)^2\)