Question

6. The factorisation of x 2 + 7x +Io is

Answer 1

${x}^{2} + 7x + 10 = 0 \\ {x}^{2} + 5x + 2x + 10 = 0 \\ x(x + 5) + 2(x + 5) = 0 \\ (x + 2)(x + 5) = 0 \\ x + 2 = 0 \\ x = - 2$

$x + 5 = 0 \\ x = - 5$