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heerinfgsd heerinfgsd
  • 09-02-2017
  • Mathematics
Answered

Factorise: a^2 + 8a - 20

Verified Answer :

toriking098 toriking098
  • 09-02-2017

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

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yacine78941 yacine78941
  • 09-02-2017

a² + 8a - 20 = a² + 24a - 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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