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

User Sairfan
by
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1 Answer

2 votes

Answer:

(x + 3)(x + 7)

Explanation:

Given

x² + 10x + 21

Consider the factors of the constant term (+ 21) which sum to give the coefficient of the x- term (+ 10)

The factors are + 3 and + 7, since

3 × 7 = 21 and 3 + 7 = 10, hence

x² + 10x + 21 = (x + 3)(x + 7)

User Seiya Su
by
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