Question

Answer 1

1: \(=\left(3x-2\right)\left(y+7\right)\)

b: \(=-x\left(x-y\right)-3\left(x-y\right)\)

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

c: \(=\left(x-3y\right)^2\)

Answer 2

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