30X^2-18X+0.8=0

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Solution for 30X^2-18X+0.8=0 equation:


Simplifying
30X2 + -18X + 0.8 = 0

Reorder the terms:
0.8 + -18X + 30X2 = 0

Solving
0.8 + -18X + 30X2 = 0

Solving for variable 'X'.

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

Divide each side by '30'.
0.02666666667 + -0.6X + X2 = 0

Move the constant term to the right:

Add '-0.02666666667' to each side of the equation.
0.02666666667 + -0.6X + -0.02666666667 + X2 = 0 + -0.02666666667

Reorder the terms:
0.02666666667 + -0.02666666667 + -0.6X + X2 = 0 + -0.02666666667

Combine like terms: 0.02666666667 + -0.02666666667 = 0.00000000000
0.00000000000 + -0.6X + X2 = 0 + -0.02666666667
-0.6X + X2 = 0 + -0.02666666667

Combine like terms: 0 + -0.02666666667 = -0.02666666667
-0.6X + X2 = -0.02666666667

The X term is -0.6X.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6X + 0.09 + X2 = -0.02666666667 + 0.09

Reorder the terms:
0.09 + -0.6X + X2 = -0.02666666667 + 0.09

Combine like terms: -0.02666666667 + 0.09 = 0.06333333333
0.09 + -0.6X + X2 = 0.06333333333

Factor a perfect square on the left side:
(X + -0.3)(X + -0.3) = 0.06333333333

Calculate the square root of the right side: 0.251661148

Break this problem into two subproblems by setting 
(X + -0.3) equal to 0.251661148 and -0.251661148.

Subproblem 1

X + -0.3 = 0.251661148 Simplifying X + -0.3 = 0.251661148 Reorder the terms: -0.3 + X = 0.251661148 Solving -0.3 + X = 0.251661148 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + X = 0.251661148 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + X = 0.251661148 + 0.3 X = 0.251661148 + 0.3 Combine like terms: 0.251661148 + 0.3 = 0.551661148 X = 0.551661148 Simplifying X = 0.551661148

Subproblem 2

X + -0.3 = -0.251661148 Simplifying X + -0.3 = -0.251661148 Reorder the terms: -0.3 + X = -0.251661148 Solving -0.3 + X = -0.251661148 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + X = -0.251661148 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + X = -0.251661148 + 0.3 X = -0.251661148 + 0.3 Combine like terms: -0.251661148 + 0.3 = 0.048338852 X = 0.048338852 Simplifying X = 0.048338852

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.551661148, 0.048338852}

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