Math

Factor and check x^2 + 10x + 21 = 0

Asked by AnneS2 on 18 Jun 05:15

Last updated by anonymous on 19 Jun 11:52

1 Answers

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Answered by CherieS on 19 Jun 11:52

x^2 + 10x + 21 = 0

(x ) (x ) ( +3)( +7)=0

(x+3) (x+7) = 0

Check:

(x+3) (x+7) = 0

(x)(x) (x)(7) (3)(x) (3)(7)=0

x^2 +7x +3x +21=0

x^2 + 10x + 21 = 0