7x+9=-4x^2

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Solution for 7x+9=-4x^2 equation:


Simplifying
7x + 9 = -4x2

Reorder the terms:
9 + 7x = -4x2

Solving
9 + 7x = -4x2

Solving for variable 'x'.

Combine like terms: -4x2 + 4x2 = 0
9 + 7x + 4x2 = 0

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

Divide each side by '4'.
2.25 + 1.75x + x2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 1.75x + -2.25 + x2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 1.75x + x2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 1.75x + x2 = 0 + -2.25
1.75x + x2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
1.75x + x2 = -2.25

The x term is 1.75x.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75x + 0.765625 + x2 = -2.25 + 0.765625

Reorder the terms:
0.765625 + 1.75x + x2 = -2.25 + 0.765625

Combine like terms: -2.25 + 0.765625 = -1.484375
0.765625 + 1.75x + x2 = -1.484375

Factor a perfect square on the left side:
(x + 0.875)(x + 0.875) = -1.484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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