Question

What is the solution set for 2n squared +7n-9=0

Answer 1

n = 1, -9/2

Explanation:

`2n^2 + 7n - 9=0`

`2n^2 - 2n + 9n - 9=0\\2n (n - 1) + 9(n - 1)=0\\(n-1)(2n+9)=0`

`n-1=0\\or \\2n+9=0`

`n = 1, -9/2`