7u^2+42=98

Solution for 7u^2+42=98 equation:

Simplifying
7u2 + 42 = 98

Reorder the terms:
42 + 7u2 = 98

Solving
42 + 7u2 = 98

Solving for variable 'u'.

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

Add '-42' to each side of the equation.
42 + -42 + 7u2 = 98 + -42

Combine like terms: 42 + -42 = 0
0 + 7u2 = 98 + -42
7u2 = 98 + -42

Combine like terms: 98 + -42 = 56
7u2 = 56

Divide each side by '7'.
u2 = 8

Simplifying
u2 = 8

Take the square root of each side:
u = {-2.828427125, 2.828427125}