Question

Given that f(x) = 4x³- 4x²-15+18

i) show that x+2 is a factor of f(x)
ii) Hence factorise f(x) completely and solve the equation f(x)=0​

Answer 1

Step-by-step explanation:

so X=-2

$4( - 2) {3} - 4( - 2) {}^{2} - 15 + 18$

$4( - 8) - 4(4) + 3$