40x^2-53x=-30

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Solution for 40x^2-53x=-30 equation:


Simplifying
40x2 + -53x = -30

Reorder the terms:
-53x + 40x2 = -30

Solving
-53x + 40x2 = -30

Solving for variable 'x'.

Reorder the terms:
30 + -53x + 40x2 = -30 + 30

Combine like terms: -30 + 30 = 0
30 + -53x + 40x2 = 0

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

Divide each side by '40'.
0.75 + -1.325x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -1.325x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -1.325x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -1.325x + x2 = 0 + -0.75
-1.325x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-1.325x + x2 = -0.75

The x term is -1.325x.  Take half its coefficient (-0.6625).
Square it (0.43890625) and add it to both sides.

Add '0.43890625' to each side of the equation.
-1.325x + 0.43890625 + x2 = -0.75 + 0.43890625

Reorder the terms:
0.43890625 + -1.325x + x2 = -0.75 + 0.43890625

Combine like terms: -0.75 + 0.43890625 = -0.31109375
0.43890625 + -1.325x + x2 = -0.31109375

Factor a perfect square on the left side:
(x + -0.6625)(x + -0.6625) = -0.31109375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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