4r^2+3r+7=0

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Solution for 4r^2+3r+7=0 equation:


Simplifying
4r2 + 3r + 7 = 0

Reorder the terms:
7 + 3r + 4r2 = 0

Solving
7 + 3r + 4r2 = 0

Solving for variable 'r'.

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

Divide each side by '4'.
1.75 + 0.75r + r2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + 0.75r + -1.75 + r2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + 0.75r + r2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + 0.75r + r2 = 0 + -1.75
0.75r + r2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
0.75r + r2 = -1.75

The r term is 0.75r.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75r + 0.140625 + r2 = -1.75 + 0.140625

Reorder the terms:
0.140625 + 0.75r + r2 = -1.75 + 0.140625

Combine like terms: -1.75 + 0.140625 = -1.609375
0.140625 + 0.75r + r2 = -1.609375

Factor a perfect square on the left side:
(r + 0.375)(r + 0.375) = -1.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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