SOLUTION: write the quadratic equation in stardard form. solve using the quadritic formula 2x expontent 2=4x+30

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Question 307322: write the quadratic equation in stardard form. solve using the quadritic formula
2x expontent 2=4x+30
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
write the quadratic equation in standard form. solve using the quadratic formula
:
2x^2 = 4x + 30
put in the form: ax^2 + bx + c = 0
2x^2 - 4x - 30 = 0
The quadratic formula
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
In this equation a=2; b=-4; c=-30
x+=+%28-%28-4%29+%2B-+sqrt%28-4%5E2-4%2A2%2A-30+%29%29%2F%282%2A2%29+
:
x+=+%284+%2B-+sqrt%2816+-+%28-240%29+%29%29%2F4+
:
x+=+%284+%2B-+sqrt%2816+%2B+240+%29%29%2F4+
:
x+=+%284+%2B-+sqrt%28256+%29%29%2F4+
Two solutions
x+=+%284+%2B+16%29%2F4+
x = 20%2F4
x = 5
and
x+=+%284+-+16%29%2F4+
x = %28-12%29%2F4
x = -3