(5x^2+4)(3)+(3x-2)(20x)=

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Solution for (5x^2+4)(3)+(3x-2)(20x)= equation:


Simplifying
(5x2 + 4)(3) + (3x + -2)(20x) = 0

Reorder the terms:
(4 + 5x2)(3) + (3x + -2)(20x) = 0

Reorder the terms for easier multiplication:
3(4 + 5x2) + (3x + -2)(20x) = 0
(4 * 3 + 5x2 * 3) + (3x + -2)(20x) = 0
(12 + 15x2) + (3x + -2)(20x) = 0

Reorder the terms:
12 + 15x2 + (-2 + 3x)(20x) = 0

Remove parenthesis around (20x)
12 + 15x2 + (-2 + 3x) * 20x = 0

Reorder the terms for easier multiplication:
12 + 15x2 + 20x(-2 + 3x) = 0
12 + 15x2 + (-2 * 20x + 3x * 20x) = 0
12 + 15x2 + (-40x + 60x2) = 0

Reorder the terms:
12 + -40x + 15x2 + 60x2 = 0

Combine like terms: 15x2 + 60x2 = 75x2
12 + -40x + 75x2 = 0

Solving
12 + -40x + 75x2 = 0

Solving for variable 'x'.

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

Divide each side by '75'.
0.16 + -0.5333333333x + x2 = 0

Move the constant term to the right:

Add '-0.16' to each side of the equation.
0.16 + -0.5333333333x + -0.16 + x2 = 0 + -0.16

Reorder the terms:
0.16 + -0.16 + -0.5333333333x + x2 = 0 + -0.16

Combine like terms: 0.16 + -0.16 = 0.00
0.00 + -0.5333333333x + x2 = 0 + -0.16
-0.5333333333x + x2 = 0 + -0.16

Combine like terms: 0 + -0.16 = -0.16
-0.5333333333x + x2 = -0.16

The x term is -0.5333333333x.  Take half its coefficient (-0.2666666667).
Square it (0.07111111113) and add it to both sides.

Add '0.07111111113' to each side of the equation.
-0.5333333333x + 0.07111111113 + x2 = -0.16 + 0.07111111113

Reorder the terms:
0.07111111113 + -0.5333333333x + x2 = -0.16 + 0.07111111113

Combine like terms: -0.16 + 0.07111111113 = -0.08888888887
0.07111111113 + -0.5333333333x + x2 = -0.08888888887

Factor a perfect square on the left side:
(x + -0.2666666667)(x + -0.2666666667) = -0.08888888887

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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