4.9x^2-343x-27=0

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Solution for 4.9x^2-343x-27=0 equation:


Simplifying
4.9x2 + -343x + -27 = 0

Reorder the terms:
-27 + -343x + 4.9x2 = 0

Solving
-27 + -343x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-5.510204082 + -70x + x2 = 0

Move the constant term to the right:

Add '5.510204082' to each side of the equation.
-5.510204082 + -70x + 5.510204082 + x2 = 0 + 5.510204082

Reorder the terms:
-5.510204082 + 5.510204082 + -70x + x2 = 0 + 5.510204082

Combine like terms: -5.510204082 + 5.510204082 = 0.000000000
0.000000000 + -70x + x2 = 0 + 5.510204082
-70x + x2 = 0 + 5.510204082

Combine like terms: 0 + 5.510204082 = 5.510204082
-70x + x2 = 5.510204082

The x term is -70x.  Take half its coefficient (-35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
-70x + 1225 + x2 = 5.510204082 + 1225

Reorder the terms:
1225 + -70x + x2 = 5.510204082 + 1225

Combine like terms: 5.510204082 + 1225 = 1230.510204082
1225 + -70x + x2 = 1230.510204082

Factor a perfect square on the left side:
(x + -35)(x + -35) = 1230.510204082

Calculate the square root of the right side: 35.07862888

Break this problem into two subproblems by setting 
(x + -35) equal to 35.07862888 and -35.07862888.

Subproblem 1

x + -35 = 35.07862888 Simplifying x + -35 = 35.07862888 Reorder the terms: -35 + x = 35.07862888 Solving -35 + x = 35.07862888 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = 35.07862888 + 35 Combine like terms: -35 + 35 = 0 0 + x = 35.07862888 + 35 x = 35.07862888 + 35 Combine like terms: 35.07862888 + 35 = 70.07862888 x = 70.07862888 Simplifying x = 70.07862888

Subproblem 2

x + -35 = -35.07862888 Simplifying x + -35 = -35.07862888 Reorder the terms: -35 + x = -35.07862888 Solving -35 + x = -35.07862888 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = -35.07862888 + 35 Combine like terms: -35 + 35 = 0 0 + x = -35.07862888 + 35 x = -35.07862888 + 35 Combine like terms: -35.07862888 + 35 = -0.07862888 x = -0.07862888 Simplifying x = -0.07862888

Solution

The solution to the problem is based on the solutions from the subproblems. x = {70.07862888, -0.07862888}

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