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

User Raghvendra Kumar
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2 Answers

4 votes
a^2 + 10a + 21
a^2 + 7a + 3a + 21
a (a + 7) + 3 (a + 7)
(a + 7) (a + 3)
User GianhTran
by
4.3k 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)

User Vii
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