Math, asked by sneha1624, 1 year ago

factorise x^2-4x-21

Answers

Answered by Anonymous

31

x²-4x-21

Factorization :

x²-4x-21

x²+3x-7x-21

x(x+3)-7(x+3)

(x+3)(x-7)

Answered by cutebabe6666

17

Heya here is your answer

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X^2-4x-21

-4x=-7x+3x

=> x^2-7x+3x-21

=>(x-7)(x+3)

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