4X+2=5X^2

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Solution for 4X+2=5X^2 equation:


Simplifying
4X + 2 = 5X2

Reorder the terms:
2 + 4X = 5X2

Solving
2 + 4X = 5X2

Solving for variable 'X'.

Combine like terms: 5X2 + -5X2 = 0
2 + 4X + -5X2 = 0

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

Divide each side by '-5'.
-0.4 + -0.8X + X2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -0.8X + 0.4 + X2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -0.8X + X2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -0.8X + X2 = 0 + 0.4
-0.8X + X2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-0.8X + X2 = 0.4

The X term is -0.8X.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8X + 0.16 + X2 = 0.4 + 0.16

Reorder the terms:
0.16 + -0.8X + X2 = 0.4 + 0.16

Combine like terms: 0.4 + 0.16 = 0.56
0.16 + -0.8X + X2 = 0.56

Factor a perfect square on the left side:
(X + -0.4)(X + -0.4) = 0.56

Calculate the square root of the right side: 0.748331477

Break this problem into two subproblems by setting 
(X + -0.4) equal to 0.748331477 and -0.748331477.

Subproblem 1

X + -0.4 = 0.748331477 Simplifying X + -0.4 = 0.748331477 Reorder the terms: -0.4 + X = 0.748331477 Solving -0.4 + X = 0.748331477 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + X = 0.748331477 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + X = 0.748331477 + 0.4 X = 0.748331477 + 0.4 Combine like terms: 0.748331477 + 0.4 = 1.148331477 X = 1.148331477 Simplifying X = 1.148331477

Subproblem 2

X + -0.4 = -0.748331477 Simplifying X + -0.4 = -0.748331477 Reorder the terms: -0.4 + X = -0.748331477 Solving -0.4 + X = -0.748331477 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + X = -0.748331477 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + X = -0.748331477 + 0.4 X = -0.748331477 + 0.4 Combine like terms: -0.748331477 + 0.4 = -0.348331477 X = -0.348331477 Simplifying X = -0.348331477

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.148331477, -0.348331477}

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