SOLUTION: 2x^2+7x-2=0 skolve for x using quadratic formula if there is more than one solution separate with commas

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Question 48938: 2x^2+7x-2=0 skolve for x using quadratic formula if there is more than one solution separate with commas
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
2x^2+7x-2=0
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ [The quadratic formula]
.
Values:
a=2
b=7
c=-2
.
x+=+%28-7+%2B-+sqrt%28+7%5E2-4%2A2%2A%28-2%29+%29%29%2F%282%2A2%29+ [Plug-in the values]
.
x+=+%28-7+%2B-+sqrt%28+49-%28-16%29+%29%29%2F%284%29+ [Simplify]
.
x+=+%28-7+%2B-+sqrt%28+%2865%29+%29%29%2F%284%29+
.
Two answers:
x+=+%28-7+%2B+%28+8.0623+%29%29%2F%284%29+
x = 0.2656
.
or
.
x+=+%28-7+-+%28+8.0623+%29%29%2F%284%29+
x=-3.766
.
Check each value of x by plugging (x=0.2656) or (x=-3.766) back into the original equation.