z^2+14z-48=0

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Solution for z^2+14z-48=0 equation:


Simplifying
z2 + 14z + -48 = 0

Reorder the terms:
-48 + 14z + z2 = 0

Solving
-48 + 14z + z2 = 0

Solving for variable 'z'.

Begin completing the square.

Move the constant term to the right:

Add '48' to each side of the equation.
-48 + 14z + 48 + z2 = 0 + 48

Reorder the terms:
-48 + 48 + 14z + z2 = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 14z + z2 = 0 + 48
14z + z2 = 0 + 48

Combine like terms: 0 + 48 = 48
14z + z2 = 48

The z term is 14z.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14z + 49 + z2 = 48 + 49

Reorder the terms:
49 + 14z + z2 = 48 + 49

Combine like terms: 48 + 49 = 97
49 + 14z + z2 = 97

Factor a perfect square on the left side:
(z + 7)(z + 7) = 97

Calculate the square root of the right side: 9.848857802

Break this problem into two subproblems by setting 
(z + 7) equal to 9.848857802 and -9.848857802.

Subproblem 1

z + 7 = 9.848857802 Simplifying z + 7 = 9.848857802 Reorder the terms: 7 + z = 9.848857802 Solving 7 + z = 9.848857802 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + z = 9.848857802 + -7 Combine like terms: 7 + -7 = 0 0 + z = 9.848857802 + -7 z = 9.848857802 + -7 Combine like terms: 9.848857802 + -7 = 2.848857802 z = 2.848857802 Simplifying z = 2.848857802

Subproblem 2

z + 7 = -9.848857802 Simplifying z + 7 = -9.848857802 Reorder the terms: 7 + z = -9.848857802 Solving 7 + z = -9.848857802 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + z = -9.848857802 + -7 Combine like terms: 7 + -7 = 0 0 + z = -9.848857802 + -7 z = -9.848857802 + -7 Combine like terms: -9.848857802 + -7 = -16.848857802 z = -16.848857802 Simplifying z = -16.848857802

Solution

The solution to the problem is based on the solutions from the subproblems. z = {2.848857802, -16.848857802}

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