4k^2+5k-3+5k^2+2=

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Solution for 4k^2+5k-3+5k^2+2= equation:


Simplifying
4k2 + 5k + -3 + 5k2 + 2 = 0

Reorder the terms:
-3 + 2 + 5k + 4k2 + 5k2 = 0

Combine like terms: -3 + 2 = -1
-1 + 5k + 4k2 + 5k2 = 0

Combine like terms: 4k2 + 5k2 = 9k2
-1 + 5k + 9k2 = 0

Solving
-1 + 5k + 9k2 = 0

Solving for variable 'k'.

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

Divide each side by '9'.
-0.1111111111 + 0.5555555556k + k2 = 0

Move the constant term to the right:

Add '0.1111111111' to each side of the equation.
-0.1111111111 + 0.5555555556k + 0.1111111111 + k2 = 0 + 0.1111111111

Reorder the terms:
-0.1111111111 + 0.1111111111 + 0.5555555556k + k2 = 0 + 0.1111111111

Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000
0.0000000000 + 0.5555555556k + k2 = 0 + 0.1111111111
0.5555555556k + k2 = 0 + 0.1111111111

Combine like terms: 0 + 0.1111111111 = 0.1111111111
0.5555555556k + k2 = 0.1111111111

The k term is 0.5555555556k.  Take half its coefficient (0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
0.5555555556k + 0.07716049384 + k2 = 0.1111111111 + 0.07716049384

Reorder the terms:
0.07716049384 + 0.5555555556k + k2 = 0.1111111111 + 0.07716049384

Combine like terms: 0.1111111111 + 0.07716049384 = 0.18827160494
0.07716049384 + 0.5555555556k + k2 = 0.18827160494

Factor a perfect square on the left side:
(k + 0.2777777778)(k + 0.2777777778) = 0.18827160494

Calculate the square root of the right side: 0.43390276

Break this problem into two subproblems by setting 
(k + 0.2777777778) equal to 0.43390276 and -0.43390276.

Subproblem 1

k + 0.2777777778 = 0.43390276 Simplifying k + 0.2777777778 = 0.43390276 Reorder the terms: 0.2777777778 + k = 0.43390276 Solving 0.2777777778 + k = 0.43390276 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + k = 0.43390276 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + k = 0.43390276 + -0.2777777778 k = 0.43390276 + -0.2777777778 Combine like terms: 0.43390276 + -0.2777777778 = 0.1561249822 k = 0.1561249822 Simplifying k = 0.1561249822

Subproblem 2

k + 0.2777777778 = -0.43390276 Simplifying k + 0.2777777778 = -0.43390276 Reorder the terms: 0.2777777778 + k = -0.43390276 Solving 0.2777777778 + k = -0.43390276 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + k = -0.43390276 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + k = -0.43390276 + -0.2777777778 k = -0.43390276 + -0.2777777778 Combine like terms: -0.43390276 + -0.2777777778 = -0.7116805378 k = -0.7116805378 Simplifying k = -0.7116805378

Solution

The solution to the problem is based on the solutions from the subproblems. k = {0.1561249822, -0.7116805378}

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