Question

If f(x) = x2 – 2x and g(x) = 6x + 4, for which value of x does (f + g)(x) = 0?

Answer 1

hloo user ,
$(f + g)(x) = (fx + gx) \: so \: x ^{2} - 2x + 6x + 4 = x ^{2} + 4x +4 \: by \: factorization \: x {}^{2} + 2x + 2x + 4 \: \: \: then \: it \: cn \: be \: written \: as \: x(x + 2) \: 2(x + 2) \: and \: the \: factors \: are \: x = - 2 \: and \: - 2$