What is the factor of a^2 + 10a + 21

asked Nov 20, 2021 13.2k views

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4 votes

a^2 + 10a + 21
a^2 + 7a + 3a + 21
a (a + 7) + 3 (a + 7)
(a + 7) (a + 3)

GianhTran answered Nov 20, 2021

6.9k points

4 votes

Answer:

a^2+10a+21

=a^2+a(7+3 )+21

=a^2+7a+3a+21

=a(a+7)+3(a+7)

=(a+7)(a+3)

Vii answered Nov 24, 2021

by Vii

7.2k points

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