SOLUTION: 1.) 2x^2 - 5x – 10 = 0 2.) 3x^2 - 8x + 5 = 0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: 1.) 2x^2 - 5x – 10 = 0 2.) 3x^2 - 8x + 5 = 0      Log On


   

Question 125099:
1.) 2x^2 - 5x – 10 = 0
2.) 3x^2 - 8x + 5 = 0
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
1) 2x^2-5x-10=0 using the quadratic equation we get:
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(5+-sqrt[-5^2-4*2*-10])/2*2
x=(5+-sqrt[25+80])/4
x=(5+-sqrt105)/4
x=(5+-10.25)/4
x=(5+10.25)/4
x=15.25/4
x=3.81 answer.
x=(5-10.25)/4
x=-5.25/4
x=-1.31 answer.
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2) 3x^2-8x+5=0
(3x-5)(x-1)=0
3x-5=0
3x=5
x=5/3 answer.
x-1=0
x=1 answer.