7.45x^2+3.11x=5.22

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Solution for 7.45x^2+3.11x=5.22 equation:


Simplifying
7.45x2 + 3.11x = 5.22

Reorder the terms:
3.11x + 7.45x2 = 5.22

Solving
3.11x + 7.45x2 = 5.22

Solving for variable 'x'.

Reorder the terms:
-5.22 + 3.11x + 7.45x2 = 5.22 + -5.22

Combine like terms: 5.22 + -5.22 = 0.00
-5.22 + 3.11x + 7.45x2 = 0.00

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

Divide each side by '7.45'.
-0.7006711409 + 0.4174496644x + x2 = 0

Move the constant term to the right:

Add '0.7006711409' to each side of the equation.
-0.7006711409 + 0.4174496644x + 0.7006711409 + x2 = 0 + 0.7006711409

Reorder the terms:
-0.7006711409 + 0.7006711409 + 0.4174496644x + x2 = 0 + 0.7006711409

Combine like terms: -0.7006711409 + 0.7006711409 = 0.0000000000
0.0000000000 + 0.4174496644x + x2 = 0 + 0.7006711409
0.4174496644x + x2 = 0 + 0.7006711409

Combine like terms: 0 + 0.7006711409 = 0.7006711409
0.4174496644x + x2 = 0.7006711409

The x term is 0.4174496644x.  Take half its coefficient (0.2087248322).
Square it (0.04356605558) and add it to both sides.

Add '0.04356605558' to each side of the equation.
0.4174496644x + 0.04356605558 + x2 = 0.7006711409 + 0.04356605558

Reorder the terms:
0.04356605558 + 0.4174496644x + x2 = 0.7006711409 + 0.04356605558

Combine like terms: 0.7006711409 + 0.04356605558 = 0.74423719648
0.04356605558 + 0.4174496644x + x2 = 0.74423719648

Factor a perfect square on the left side:
(x + 0.2087248322)(x + 0.2087248322) = 0.74423719648

Calculate the square root of the right side: 0.862691832

Break this problem into two subproblems by setting 
(x + 0.2087248322) equal to 0.862691832 and -0.862691832.

Subproblem 1

x + 0.2087248322 = 0.862691832 Simplifying x + 0.2087248322 = 0.862691832 Reorder the terms: 0.2087248322 + x = 0.862691832 Solving 0.2087248322 + x = 0.862691832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2087248322' to each side of the equation. 0.2087248322 + -0.2087248322 + x = 0.862691832 + -0.2087248322 Combine like terms: 0.2087248322 + -0.2087248322 = 0.0000000000 0.0000000000 + x = 0.862691832 + -0.2087248322 x = 0.862691832 + -0.2087248322 Combine like terms: 0.862691832 + -0.2087248322 = 0.6539669998 x = 0.6539669998 Simplifying x = 0.6539669998

Subproblem 2

x + 0.2087248322 = -0.862691832 Simplifying x + 0.2087248322 = -0.862691832 Reorder the terms: 0.2087248322 + x = -0.862691832 Solving 0.2087248322 + x = -0.862691832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2087248322' to each side of the equation. 0.2087248322 + -0.2087248322 + x = -0.862691832 + -0.2087248322 Combine like terms: 0.2087248322 + -0.2087248322 = 0.0000000000 0.0000000000 + x = -0.862691832 + -0.2087248322 x = -0.862691832 + -0.2087248322 Combine like terms: -0.862691832 + -0.2087248322 = -1.0714166642 x = -1.0714166642 Simplifying x = -1.0714166642

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6539669998, -1.0714166642}

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