Question

Which expression is the factorization of x2 + 10x + 21?

Answer 1

Answer:

x^2+10x+21

x^2 +7x+3x+21

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

(x+3) (x+7)

Step-by-step explanation:

x+3 =0

x=-3

x+7 =0

x=-7

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