10x^2=3(7x-4)

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Solution for 10x^2=3(7x-4) equation:


Simplifying
10x2 = 3(7x + -4)

Reorder the terms:
10x2 = 3(-4 + 7x)
10x2 = (-4 * 3 + 7x * 3)
10x2 = (-12 + 21x)

Solving
10x2 = -12 + 21x

Solving for variable 'x'.

Reorder the terms:
12 + -21x + 10x2 = -12 + 21x + 12 + -21x

Reorder the terms:
12 + -21x + 10x2 = -12 + 12 + 21x + -21x

Combine like terms: -12 + 12 = 0
12 + -21x + 10x2 = 0 + 21x + -21x
12 + -21x + 10x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
12 + -21x + 10x2 = 0

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

Divide each side by '10'.
1.2 + -2.1x + x2 = 0

Move the constant term to the right:

Add '-1.2' to each side of the equation.
1.2 + -2.1x + -1.2 + x2 = 0 + -1.2

Reorder the terms:
1.2 + -1.2 + -2.1x + x2 = 0 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + -2.1x + x2 = 0 + -1.2
-2.1x + x2 = 0 + -1.2

Combine like terms: 0 + -1.2 = -1.2
-2.1x + x2 = -1.2

The x term is -2.1x.  Take half its coefficient (-1.05).
Square it (1.1025) and add it to both sides.

Add '1.1025' to each side of the equation.
-2.1x + 1.1025 + x2 = -1.2 + 1.1025

Reorder the terms:
1.1025 + -2.1x + x2 = -1.2 + 1.1025

Combine like terms: -1.2 + 1.1025 = -0.0975
1.1025 + -2.1x + x2 = -0.0975

Factor a perfect square on the left side:
(x + -1.05)(x + -1.05) = -0.0975

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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