5z^2+14z+49=0

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Solution for 5z^2+14z+49=0 equation:


Simplifying
5z2 + 14z + 49 = 0

Reorder the terms:
49 + 14z + 5z2 = 0

Solving
49 + 14z + 5z2 = 0

Solving for variable 'z'.

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

Divide each side by '5'.
9.8 + 2.8z + z2 = 0

Move the constant term to the right:

Add '-9.8' to each side of the equation.
9.8 + 2.8z + -9.8 + z2 = 0 + -9.8

Reorder the terms:
9.8 + -9.8 + 2.8z + z2 = 0 + -9.8

Combine like terms: 9.8 + -9.8 = 0.0
0.0 + 2.8z + z2 = 0 + -9.8
2.8z + z2 = 0 + -9.8

Combine like terms: 0 + -9.8 = -9.8
2.8z + z2 = -9.8

The z term is 2.8z.  Take half its coefficient (1.4).
Square it (1.96) and add it to both sides.

Add '1.96' to each side of the equation.
2.8z + 1.96 + z2 = -9.8 + 1.96

Reorder the terms:
1.96 + 2.8z + z2 = -9.8 + 1.96

Combine like terms: -9.8 + 1.96 = -7.84
1.96 + 2.8z + z2 = -7.84

Factor a perfect square on the left side:
(z + 1.4)(z + 1.4) = -7.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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