SOLUTION: help me solve please... 15x - 4/x = 4 the -4 is over x. thanks!

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Question 56544: help me solve please...
15x - 4/x = 4

the -4 is over x. thanks!
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
15x - 4/x = 4 [Multiply all terms by the LDC=x]
x(15x-4/2=4)
15x^2-4=4x [Simplify]
15x^2-4x-4 [Use the quadratic formula to solve]
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
.

.
x+=+%284%29+%2B-+sqrt%28%28+%2816%29-%28-240%29+%29%29%2F%2830%29%29%29+
.
x+=+%284%29+%2B-+sqrt%28+%28%28256%29+%29%29%2F%2830%29%29%29+
.
x+=+%284%29+%2B+%2816%29+%2F%2830%29%29+ =.666
.
x+=+%284%29+-+%2816%29+%2F%2830%29%29+ = -0.4
.
Check by plugging each value of x back into the original equation.