Question

Factorise:
16x² − 24x + 9

Answer 1

We have:
$16x^2-24x+9={\left(4x\right)}^2-2\times 4x\times 3+{\left(3\right)}^2$
$={\left(4x-3\right)}^2$

∴ $16x^2-24x+9={\left(4x-3\right)}^2$