Question

Factorise x^2 - x - 20

Answer 1

Explanation:

x²-x-20

x²-5x+4x-20

x(x-5)+4(x-5)

(x+4)(x-5)=0

x=5, -4

Two roots are -4 and 5

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Answer 2

Answer:

x^2-x-20

x^2 +4x -5x -20

x(x+4) -5(x+4)

(x-5)(x+4)

x=5 , x=-4

Explanation:

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