x(3x-14)=-21

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Solution for x(3x-14)=-21 equation:


Simplifying
x(3x + -14) = -21

Reorder the terms:
x(-14 + 3x) = -21
(-14 * x + 3x * x) = -21
(-14x + 3x2) = -21

Solving
-14x + 3x2 = -21

Solving for variable 'x'.

Reorder the terms:
21 + -14x + 3x2 = -21 + 21

Combine like terms: -21 + 21 = 0
21 + -14x + 3x2 = 0

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

Divide each side by '3'.
7 + -4.666666667x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -4.666666667x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -4.666666667x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -4.666666667x + x2 = 0 + -7
-4.666666667x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-4.666666667x + x2 = -7

The x term is -4.666666667x.  Take half its coefficient (-2.333333334).
Square it (5.444444448) and add it to both sides.

Add '5.444444448' to each side of the equation.
-4.666666667x + 5.444444448 + x2 = -7 + 5.444444448

Reorder the terms:
5.444444448 + -4.666666667x + x2 = -7 + 5.444444448

Combine like terms: -7 + 5.444444448 = -1.555555552
5.444444448 + -4.666666667x + x2 = -1.555555552

Factor a perfect square on the left side:
(x + -2.333333334)(x + -2.333333334) = -1.555555552

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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