jakiashajohnson56789 jakiashajohnson56789
  • 12-02-2020
  • Mathematics
contestada

Factoring polynomials 3x^2+42x+72

Respuesta :

jimrgrant1 jimrgrant1
  • 12-02-2020

Answer:

3(x + 12)(x + 2)

Step-by-step explanation:

Given

3x² + 42x + 72 ← factor out 3 from each term

= 3(x² + 14x + 24) ← factor the quadratic

Consider the factors of the constant term (+ 24) which sum to give the coefficient of the x- term.

The factors are + 12 and + 2, since

12 × 2 = 24 and 12 + 2 = 14, thus

x² + 14x + 24 = (x + 12)(x + 2) and

3x² + 42x + 72

= 3(x + 12)(x + 2) ← in factored form

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