How do you factor x squared plus 15X plus 54?

Answer 1

x2 + 15x + 54 = (x + 6)(x + 9) or (x + 9)(x + 6) since 6*9 = 54 and 6 + 9 = 15

However, commutativity is implicit in deriving this factorisation so that the two factorisations are the same.

or factor by grouping

x2 + 15x + 54

= x2 + 6x + 9x + 54

= (x2 + 6x) + (9x + 54)

= x(x + 6) + 9(x + 6)

= (x + 6)(x + 9)

Answer 2

2x2+15x-8 = (2x-1)(x+8) when factored with the help of the quadratic formula

Answer 3

(x + 6)(x + 9)