Question

jl;k

Answer 1

y = (x-6) (x+5) (x+13)
(x+5) (x+13)
x(x+13)+5(x+13)
\[^{x2} + 18x + 65\]
y = (x-6)(x+5)(x+13)
y=(x-6)(x^2 + 18x + 65)
y = x(x^2 + 18x + 65) -6 (x^2 + 18x + 65)
x^3 + 18x^2 + 65 x - 6x^2 - 108x - 390
x^3 + 12x^2 - 43x - 390
f(x) = x^3 + 12x^2 - 43 -390