Question

factorise completely:xsquared-4x-5

Answer 1

x^2 - 4x - 5. -5 = 1*(-5). -5+1 = -4 = B.

x+1 = 0. X = -1.

x + (-5) = 0. or x-5 = 0. X = 5.

x^2 - 4x - 5 = (x+1)(x-5).