SOLUTION: I thank you guys for helping me so much. Up into now i have been doing pretty well now that i am doing quadratic i need severe help i am in my last two weeks of class and now i am

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: I thank you guys for helping me so much. Up into now i have been doing pretty well now that i am doing quadratic i need severe help i am in my last two weeks of class and now i am       Log On


   

Question 80708: I thank you guys for helping me so much. Up into now i have been doing pretty well now that i am doing quadratic i need severe help i am in my last two weeks of class and now i am scarred please can you help me with this?
1. (x+5)^2=7
2. (x-3)^2=9
3. x^2-96=0
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for x:
1)
%28x%2B5%29%5E2+=+7 The short method: Take the square root of both sides.
x%2B5+=+sqrt%287%29 and x%2B5+=+-sqrt%287%29 Subtract 5 from both sides of each equation.
x+=+-5%2Bsqrt%287%29 and x+=+-5-sqrt%287%29
%28x%2B5%29%5E2+=+7 The long method: Expand the left side of the equation.
x%5E2%2B10x%2B25+=+7 Subtract 7 from both sides.
x%5E2%2B10x%2B18+=+0 Solve by the quadratic formula:x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a
x+=+%28-10%2B-sqrt%2810%5E2-4%281%29%2818%29%29%29%2F2%281%29 Simplify.
x+=+%28-10%2B-sqrt%28100-72%29%29%2F2
x+=+%28-10%2B-sqrt%2828%29%29%2F2
x+=+%28-10%2B-2%2Asqrt%287%29%29%2F2
x+=+-5%2Bsqrt%287%29 and x+=+-5-sqrt%287%29
Try the others like this!