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heerinfgsdhghh heerinfgsdhghh
  • 09-02-2017
  • Mathematics
Answered

Factorise: a^2 + 8a - 20

Verified Answer :

Pitxbullxgirl
Pitxbullxgirl Pitxbullxgirl
  • 09-02-2017

Which two numbers add up to 88 and multiply to −20?
−2 and 10

Rewrite the expression using the above:

Answer:
(a−2)(a+10)

Answer Link
mariaylbloor
mariaylbloor mariaylbloor
  • 09-02-2017

You would use the quadratic formula or graph it to find your factors. Your factors are: 

(x+10)(x-2)

Answer Link

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