4 years ago

Factorise: a^2 + 8a - 20

Mathematics

2 answers:

dusya [7]4 years ago

8 0

That would be
(a-2)(a+10)

Likurg_2 [28]4 years ago

3 0

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)

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