SOLUTION: Find the solution of ach quadratic equations using the quadratic formula . x^2+7x=4

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Question 980958: Find the solution of ach quadratic equations using the quadratic formula .
x^2+7x=4
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

x%5E2%2B7x=4

x%5E2%2B7x-4=0

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%2A1%2A%28-4%29+%29%29%2F%282%2A1%29+

x+=+%28-7+%2B-+sqrt%28+49%2B16+%29%29%2F2+

x+=+%28-7+%2B-+sqrt%28+64+%29%29%2F2+

x+=+%28-7+%2B-+8%29%2F2+

solutions:
x+=+%28-7+%2B+8%29%2F2+
x+=+1%2F2+
or
x+=+%28-7+-+8%29%2F2+
x+=+-15%2F2+
x+=+-7.5+