marnice marnice

28-01-2019
Mathematics

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Is this trinomial factorable r^2-15r+56

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jimrgrant1 jimrgrant1

28-01-2019

Answer:

(r - 8)(r - 7)

Step-by-step explanation:

Consider the factors of the constant term (56) which sum to give the coefficient of the r- term (- 15)

The factors are - 8 and - 7, hence

r² - 15r + 56 = (r - 8)(r - 7) ← in factored form

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