Question

factoriese x square -x -20 using algebraic identity ​

Answer 1

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• Factorise the polynomial.

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${x}^{2} - x - 20$

$= {x}^{2} - 5x + 4x - 20$

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

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

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• $(x + 4)(x - 5)$

Answer 2

Step-by-step explanation:

x ^2

−x−20

= {x}^{2} - 5x + 4x - 20=x

2

−5x+4x−20

= x(x - 5) + 4(x - 5)=x(x−5)+4(x−5)

= (x + 4)(x - 5)=(x+4)(x−5)