Question

Factorise: x^2 + 3x + x + 3.

Answer 1

${x}^{2} + x + 3x + 3 \\ \\ = x(x + 1) + 3(x + 1) \\ \\ = (x + 1)(x + 3)$

Answer 2

Answer:

Add and subtract the second term to the expression and factor by grouping.

(x+3)(x+1)