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8 January, 14:57

Shenika factored the polynomial completely. What is the value of A?

5x3+35x2+6x+42

(5x2+A) (x+B)

1

5

6

7

+2
Answers (2)
  1. 8 January, 15:18
    0
    A = 6

    Step-by-step explanation:

    Given

    5x³ + 35x² + 6x + 42 (factor the first/second and third/fourth terms)

    = 5x² (x + 7) + 6 (x + 7) ← factor out (x + 7) from each term

    = (x + 7) (5x² + 6) ← in factored form

    Thus

    (5x² + 6) → (5x² + A) ⇒ A = 6
  2. 8 January, 15:19
    0
    A = 6

    B = 7

    (5x^2+6) (x+7)
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