Question

a) \(\left(x-9\right)\left(x-7\right)+1\)

b)\(\left(x^2+x-1\right)^2+4x^2+4x\)

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

d)\(\left(x-y\right)^3-1-3\left(x-y\right)\left(x-y-1\right)\)

Answer 1