51forshdianne 51forshdianne

17-12-2019
Mathematics

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How to factor x ² + 8x +15 ?

Respuesta :

jimrgrant1 jimrgrant1

17-12-2019

Answer:

(x + 5)(x + 3)

Step-by-step explanation:

Given

x² + 8x + 15

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are + 5 and + 3, since

5 × 3 = 15 and 5 + 3 = 8, thus

x² + 8x + 15 = (x + 5)(x + 3) ← in factored form

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