-3x(5-2x)-3+122=

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Solution for -3x(5-2x)-3+122= equation:


Simplifying
-3x(5 + -2x) + -3 + 122 = 0
(5 * -3x + -2x * -3x) + -3 + 122 = 0
(-15x + 6x2) + -3 + 122 = 0

Reorder the terms:
-3 + 122 + -15x + 6x2 = 0

Combine like terms: -3 + 122 = 119
119 + -15x + 6x2 = 0

Solving
119 + -15x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
19.83333333 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-19.83333333' to each side of the equation.
19.83333333 + -2.5x + -19.83333333 + x2 = 0 + -19.83333333

Reorder the terms:
19.83333333 + -19.83333333 + -2.5x + x2 = 0 + -19.83333333

Combine like terms: 19.83333333 + -19.83333333 = 0.00000000
0.00000000 + -2.5x + x2 = 0 + -19.83333333
-2.5x + x2 = 0 + -19.83333333

Combine like terms: 0 + -19.83333333 = -19.83333333
-2.5x + x2 = -19.83333333

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -19.83333333 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -19.83333333 + 1.5625

Combine like terms: -19.83333333 + 1.5625 = -18.27083333
1.5625 + -2.5x + x2 = -18.27083333

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -18.27083333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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