Question 773109
If you want to expand this out, then....


(x-3)(x+7)


x(x+7) - 3(x+7)


x*x+x*7 - 3*x- 3*7


x^2 + 7x - 3x - 21


x^2 + 4x - 21



Final Answer: x^2 + 4x - 21