Question

X-1/x^2 - x - 20 Give the equivalent numerator if the denominator is (X - 5)(x + 4)(x + 3)

x^2 + 2x + 3
x^2 + 2x - 3
x^2-3​

Answer 1

`x^2+2x-3`

Explanation:

Note that
`x^2-x-20=(x-5)(x+4)`, so, if the denominator is
`(x-5)(x+4)(x+3)`, we need to multiply the numerator by
`(x+3)`. And
`(x-1)(x+3)=x^2+2x-3`.