75X^2+30X-17=0

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Solution for 75X^2+30X-17=0 equation:


Simplifying
75X2 + 30X + -17 = 0

Reorder the terms:
-17 + 30X + 75X2 = 0

Solving
-17 + 30X + 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'.
-0.2266666667 + 0.4X + X2 = 0

Move the constant term to the right:

Add '0.2266666667' to each side of the equation.
-0.2266666667 + 0.4X + 0.2266666667 + X2 = 0 + 0.2266666667

Reorder the terms:
-0.2266666667 + 0.2266666667 + 0.4X + X2 = 0 + 0.2266666667

Combine like terms: -0.2266666667 + 0.2266666667 = 0.0000000000
0.0000000000 + 0.4X + X2 = 0 + 0.2266666667
0.4X + X2 = 0 + 0.2266666667

Combine like terms: 0 + 0.2266666667 = 0.2266666667
0.4X + X2 = 0.2266666667

The X term is 0.4X.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4X + 0.04 + X2 = 0.2266666667 + 0.04

Reorder the terms:
0.04 + 0.4X + X2 = 0.2266666667 + 0.04

Combine like terms: 0.2266666667 + 0.04 = 0.2666666667
0.04 + 0.4X + X2 = 0.2666666667

Factor a perfect square on the left side:
(X + 0.2)(X + 0.2) = 0.2666666667

Calculate the square root of the right side: 0.51639778

Break this problem into two subproblems by setting 
(X + 0.2) equal to 0.51639778 and -0.51639778.

Subproblem 1

X + 0.2 = 0.51639778 Simplifying X + 0.2 = 0.51639778 Reorder the terms: 0.2 + X = 0.51639778 Solving 0.2 + X = 0.51639778 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + X = 0.51639778 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + X = 0.51639778 + -0.2 X = 0.51639778 + -0.2 Combine like terms: 0.51639778 + -0.2 = 0.31639778 X = 0.31639778 Simplifying X = 0.31639778

Subproblem 2

X + 0.2 = -0.51639778 Simplifying X + 0.2 = -0.51639778 Reorder the terms: 0.2 + X = -0.51639778 Solving 0.2 + X = -0.51639778 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + X = -0.51639778 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + X = -0.51639778 + -0.2 X = -0.51639778 + -0.2 Combine like terms: -0.51639778 + -0.2 = -0.71639778 X = -0.71639778 Simplifying X = -0.71639778

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.31639778, -0.71639778}

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