Question

Multiply: (x – 4)(x + 5)

Answer 1

Answer:

hope it helps you......

Answer 2

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(x-4)(x+5)

x² + 5x - 4x - 20

• x² + x - 20

For checking We need to Factorise this -

x² + 5x - 4x - 20 ( By Middle Term Split )

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

(x-4)(x+5)

$\sf \pmb {\underline {\boxed { \sf \: x = 4 \: or \: - 5}}}$