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Factorise: a^2 + 8a - 20

Factorise: a^2 + 8a - 20
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3 votes
Factorise: a^2 + 8a - 20

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User PJT
by
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2 Answers

6 votes
 a² + 8a - 20 = a² + 2*4*a - 20 = a² + 8a + 16 -16 - 20 = (a + 4)² - 36 = (a + 4)² - 6² = (a + 4 - 6)(a + 4 + 6) = (a - 2)(a + 10)
answered
User Lucasvscn
by
7.8k points
1 vote
that would be
(a-2)(a+10)
answered
User Rohini Choudhary
by
8.5k points
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