Question

Factorise x^3+5x^2-4x-20

Answer 1

$x { }^{3} + 5x {}^{2} - 4x - 20 \\ = x {}^{2} (x {}^{} + 5) - 4(x + 5) \\ = (x + 5)(x^2- 4)....ans$
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Answer 2

Hey there!

$x^3 + 5x^2 - 4x - 20 \\= x^2(x+5) - 4 (x+5)\\=\boxed{\boxed{(x^2-4)(x+5)}}$

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