Question

Factorise: x² + 3x + x + 3

Answer 1

x² + 3x + x + 3

x(x + 3) + 1(x + 3)

(x + 3)(x + 1)

Answer 2

$\Large\mathtt{\fcolorbox{lime}{black}{\red{Answer}}} \\ {x}^{2} + 3x + x + 3 \\ \\ = {x}^{2} + x + 3x + 3 \\ \\ = x(x + 1) + 3(x + 1) \\ \\ = (x + 3)(x + 1)$