0=4.9x^2+12x+76

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Solution for 0=4.9x^2+12x+76 equation:


Simplifying
0 = 4.9x2 + 12x + 76

Reorder the terms:
0 = 76 + 12x + 4.9x2

Solving
0 = 76 + 12x + 4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -76 = -76
-76 + -12x + -4.9x2 = 76 + 12x + 4.9x2 + -76 + -12x + -4.9x2

Reorder the terms:
-76 + -12x + -4.9x2 = 76 + -76 + 12x + -12x + 4.9x2 + -4.9x2

Combine like terms: 76 + -76 = 0
-76 + -12x + -4.9x2 = 0 + 12x + -12x + 4.9x2 + -4.9x2
-76 + -12x + -4.9x2 = 12x + -12x + 4.9x2 + -4.9x2

Combine like terms: 12x + -12x = 0
-76 + -12x + -4.9x2 = 0 + 4.9x2 + -4.9x2
-76 + -12x + -4.9x2 = 4.9x2 + -4.9x2

Combine like terms: 4.9x2 + -4.9x2 = 0.0
-76 + -12x + -4.9x2 = 0.0

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
15.51020408 + 2.448979592x + x2 = 0

Move the constant term to the right:

Add '-15.51020408' to each side of the equation.
15.51020408 + 2.448979592x + -15.51020408 + x2 = 0 + -15.51020408

Reorder the terms:
15.51020408 + -15.51020408 + 2.448979592x + x2 = 0 + -15.51020408

Combine like terms: 15.51020408 + -15.51020408 = 0.00000000
0.00000000 + 2.448979592x + x2 = 0 + -15.51020408
2.448979592x + x2 = 0 + -15.51020408

Combine like terms: 0 + -15.51020408 = -15.51020408
2.448979592x + x2 = -15.51020408

The x term is 2.448979592x.  Take half its coefficient (1.224489796).
Square it (1.499375261) and add it to both sides.

Add '1.499375261' to each side of the equation.
2.448979592x + 1.499375261 + x2 = -15.51020408 + 1.499375261

Reorder the terms:
1.499375261 + 2.448979592x + x2 = -15.51020408 + 1.499375261

Combine like terms: -15.51020408 + 1.499375261 = -14.010828819
1.499375261 + 2.448979592x + x2 = -14.010828819

Factor a perfect square on the left side:
(x + 1.224489796)(x + 1.224489796) = -14.010828819

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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