SOLUTION: x^2-3x-28=0

Algebra ->  Radicals -> SOLUTION: x^2-3x-28=0      Log On


   

Question 864987: x^2-3x-28=0
Answer by ben720(159) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2-3x-28=0
Use the Quadratic Formula
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
Plug in the values
x+=+%283+%2B-+sqrt%28+-3%5E2-4%2A1%2A-28+%29%29%2F2+
Multiply
x+=+%283+%2B-+sqrt%289%2B112+%29%29%2F2+
Add
x+=+%283+%2B-+sqrt%28121%29%29%2F2+
Split into 2 equations
x+=+%283%2B11%29%2F2+ OR x+=+%283-11%29%2F2+
Add
x=14%2F2 OR x=-12%2F2
Divide
x=7 OR x=-6

7 or -6