7x^2-21=o

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Solution for 7x^2-21=o equation:


Simplifying
7x2 + -21 = o

Reorder the terms:
-21 + 7x2 = o

Solving
-21 + 7x2 = o

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + 7x2 = 21 + o

Combine like terms: -21 + 21 = 0
0 + 7x2 = 21 + o
7x2 = 21 + o

Divide each side by '7'.
x2 = 3 + 0.1428571429o

Simplifying
x2 = 3 + 0.1428571429o

Reorder the terms:
-3 + -0.1428571429o + x2 = 3 + 0.1428571429o + -3 + -0.1428571429o

Reorder the terms:
-3 + -0.1428571429o + x2 = 3 + -3 + 0.1428571429o + -0.1428571429o

Combine like terms: 3 + -3 = 0
-3 + -0.1428571429o + x2 = 0 + 0.1428571429o + -0.1428571429o
-3 + -0.1428571429o + x2 = 0.1428571429o + -0.1428571429o

Combine like terms: 0.1428571429o + -0.1428571429o = 0.0000000000
-3 + -0.1428571429o + x2 = 0.0000000000

The solution to this equation could not be determined.

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