SOLUTION: find the range of the values of x for which 2x^2+7x-15>0

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Question 1142432: find the range of the values of x for which 2x^2+7x-15>0
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+2x%5E2+%2B+7x+-+15+%3E0+
+x+=+%28+-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
+x+=+%28+-7+%2B-+sqrt%28+7%5E2-4%2A2%2A%28-15%29+%29%29%2F%282%2A2%29+
+x+=+%28+-7+%2B-+sqrt%28+49+%2B+120+%29%29+%2F+4+
+x+=+%28+-7+%2B-+sqrt%28+169+%29%29+%2F+4+
+x+=+%28+-7+%2B+13+%29+%2F+4+
+x+=+6%2F4+
+x+=+3%2F2+
and
+x+=+%28+-7+-+13+%29+%2F+4+
+x+=+-20%2F4+
+x+=+-5+
--------------------
+%28+x+-+3%2F2+%29%2A%28+x+%2B+5+%29+%3E+0+
+3%2F2+%3C+x+%3C+-5+
-----------------------------------
Here's the plot:
+graph%28+400%2C+700%2C+-10%2C+4%2C+-25%2C+5%2C+2x%5E2+%2B+7x+-+15+%29+