Question

Factorise:
3x^2-2x-5

Answer 1

( 3
`x` - 5 ) (
`x` + 1 )

Explanation:

`3x^(2)` - 2
`x` - 5

(Multiply 3 from
`3x^(2)` with -5)

Product = -15

Sum = -2

(3 times - 5 gives the product '-15' and 3 plus -5 gives the sum -2)

`3x^(2)` + 3
`x` - 5

3
`x` (
`x` + 1 ) - 5 (
`x` + 1 )

= ( 3
`x` - 5 ) (
`x` + 1 )