z^2+98z-64=0

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Solution for z^2+98z-64=0 equation:


Simplifying
z2 + 98z + -64 = 0

Reorder the terms:
-64 + 98z + z2 = 0

Solving
-64 + 98z + z2 = 0

Solving for variable 'z'.

Begin completing the square.

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + 98z + 64 + z2 = 0 + 64

Reorder the terms:
-64 + 64 + 98z + z2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 98z + z2 = 0 + 64
98z + z2 = 0 + 64

Combine like terms: 0 + 64 = 64
98z + z2 = 64

The z term is 98z.  Take half its coefficient (49).
Square it (2401) and add it to both sides.

Add '2401' to each side of the equation.
98z + 2401 + z2 = 64 + 2401

Reorder the terms:
2401 + 98z + z2 = 64 + 2401

Combine like terms: 64 + 2401 = 2465
2401 + 98z + z2 = 2465

Factor a perfect square on the left side:
(z + 49)(z + 49) = 2465

Calculate the square root of the right side: 49.648766349

Break this problem into two subproblems by setting 
(z + 49) equal to 49.648766349 and -49.648766349.

Subproblem 1

z + 49 = 49.648766349 Simplifying z + 49 = 49.648766349 Reorder the terms: 49 + z = 49.648766349 Solving 49 + z = 49.648766349 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + z = 49.648766349 + -49 Combine like terms: 49 + -49 = 0 0 + z = 49.648766349 + -49 z = 49.648766349 + -49 Combine like terms: 49.648766349 + -49 = 0.648766349 z = 0.648766349 Simplifying z = 0.648766349

Subproblem 2

z + 49 = -49.648766349 Simplifying z + 49 = -49.648766349 Reorder the terms: 49 + z = -49.648766349 Solving 49 + z = -49.648766349 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + z = -49.648766349 + -49 Combine like terms: 49 + -49 = 0 0 + z = -49.648766349 + -49 z = -49.648766349 + -49 Combine like terms: -49.648766349 + -49 = -98.648766349 z = -98.648766349 Simplifying z = -98.648766349

Solution

The solution to the problem is based on the solutions from the subproblems. z = {0.648766349, -98.648766349}

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