7v^2-42-49=0

Solution for 7v^2-42-49=0 equation:

Simplifying
7v2 + -42 + -49 = 0

Reorder the terms:
-42 + -49 + 7v2 = 0

Combine like terms: -42 + -49 = -91
-91 + 7v2 = 0

Solving
-91 + 7v2 = 0

Solving for variable 'v'.

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

Add '91' to each side of the equation.
-91 + 91 + 7v2 = 0 + 91

Combine like terms: -91 + 91 = 0
0 + 7v2 = 0 + 91
7v2 = 0 + 91

Combine like terms: 0 + 91 = 91
7v2 = 91

Divide each side by '7'.
v2 = 13

Simplifying
v2 = 13

Take the square root of each side:
v = {-3.605551275, 3.605551275}