Question
Expand the following$:(2x - 5) (2x + 5) (2x- 3)$
✓
Answer
$(2x - 5) (2x + 5) (2x- 3)$
$= (4x^2 - 25) (2x - 3)$
$= 8x^3- 12x^2 - 50x + 75$
$($Using identity $: (x - a) (x + b))$
$= x^2 - (a - b) x - ab).$
$= (4x^2 - 25) (2x - 3)$
$= 8x^3- 12x^2 - 50x + 75$
$($Using identity $: (x - a) (x + b))$
$= x^2 - (a - b) x - ab).$
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