Question

$(m + 7)x {}^{2} + 5x - (m + 2)$
Factorisation of this sum

Answer 1

$(m + 7) {x}^{2} + (m + 7)x - (m + 2)x - (m + 2)$
=>
$(m + 7)x(x + 1) - (m + 2)(x + 1)$
=>
$((m + 7)x - (m + 2))(x + 1)$
hence it is factorization of this sum .Hope it helps you...