Question

x2 +4X-21 =? factorise
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Answer 1

here is ur answer hope it will help you!!

Answer 2

Answer:

$x^{2} +4x-21$

$x^{2} +7x-3x-21$

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

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

Step-by-step explanation:

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