lol5838
lol5838 lol5838
  • 09-01-2020
  • Mathematics
contestada

Factorise x2-22-+117

Respuesta :

laurellee27
laurellee27 laurellee27
  • 09-01-2020

Answer:

(x - 9)(x - 13)

Step-by-step explanation:

Find the factors of 117

1,117

3,39

9,13

Because 117 is positive, the factors are either both positive or both negative.

Find the pair which sums to -22. Inorder to get to -22, the factors must be negative.

-1 + -117 = -118

-3 + -39 = -42

-9 + -13 = -22

The correct factor is -9,-13. Put it inside the brackets.

(x - 9)(x - 13)

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