5x(x+3)-4(x-5)-8=

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Solution for 5x(x+3)-4(x-5)-8= equation:


Simplifying
5x(x + 3) + -4(x + -5) + -8 = 0

Reorder the terms:
5x(3 + x) + -4(x + -5) + -8 = 0
(3 * 5x + x * 5x) + -4(x + -5) + -8 = 0
(15x + 5x2) + -4(x + -5) + -8 = 0

Reorder the terms:
15x + 5x2 + -4(-5 + x) + -8 = 0
15x + 5x2 + (-5 * -4 + x * -4) + -8 = 0
15x + 5x2 + (20 + -4x) + -8 = 0

Reorder the terms:
20 + -8 + 15x + -4x + 5x2 = 0

Combine like terms: 20 + -8 = 12
12 + 15x + -4x + 5x2 = 0

Combine like terms: 15x + -4x = 11x
12 + 11x + 5x2 = 0

Solving
12 + 11x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
2.4 + 2.2x + x2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + 2.2x + -2.4 + x2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + 2.2x + x2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + 2.2x + x2 = 0 + -2.4
2.2x + x2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
2.2x + x2 = -2.4

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = -2.4 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = -2.4 + 1.21

Combine like terms: -2.4 + 1.21 = -1.19
1.21 + 2.2x + x2 = -1.19

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = -1.19

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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