21d^2-70=0

Solution for 21d^2-70=0 equation:

Simplifying
21d2 + -70 = 0

Reorder the terms:
-70 + 21d2 = 0

Solving
-70 + 21d2 = 0

Solving for variable 'd'.

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

Add '70' to each side of the equation.
-70 + 70 + 21d2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 21d2 = 0 + 70
21d2 = 0 + 70

Combine like terms: 0 + 70 = 70
21d2 = 70

Divide each side by '21'.
d2 = 3.333333333

Simplifying
d2 = 3.333333333

Take the square root of each side:
d = {-1.825741858, 1.825741858}