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

Question

Derek Hicks

Mathematics

8 December, 23:06

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

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Answers (1)

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Julissa Davies · Answer 1

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.