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23 April, 20:25

Factor the expression. 21v2 - 70v + 49

A. 7 (3v - 7) (v - 1)

B. (21v - 49) (v - 1)

C. 7 (3v + 7) (v + 1)

+1
Answers (1)
  1. 23 April, 23:36
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    A. 7 (3v-7) (v-1)

    Step-by-step explanation:

    21v2 - 70v + 49

    Factor out 7

    7 (3v2 - 10v + 7)

    write - 10v as a difference

    7 (3v2 - 3v - 7v + 7)

    Factor out 3v

    7 (3v * (v-1) - 7 * (v-1))

    Factor out (v-1)

    7 (3v-7) (v-1)
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