Question

The value of f(x) = 5x−4x²+3 when x = -1, is:If one of the factor of x²+x-20 is (x + 5). Find the other

x-4
x+3
x+4
x-5​

Answer 1

Answer:

The value of f(x) = 5x−4x²+3 when x = -1,

f(-1)=-6

factor of x²+x-20 is (x + 5)(x-4)