Expand and simplify : A) (x+7) (x+10). B) (X-3) (X-9)

Step-by-step explanation:

A) Using the foil method and distribution, you should get x²+10x+7x+70 from (X*X) + (X*10) + (X*7) + (7*10). When you combine these like terms, you get x²+17x+70.

B) Using the same ideology from part A, when you multiply x-3 into x-9. you should get x²-9x-3x+27. Simplifying this will give you x²-12x+27.