10d^2-13=-9

Solution for 10d^2-13=-9 equation:

Simplifying
10d2 + -13 = -9

Reorder the terms:
-13 + 10d2 = -9

Solving
-13 + 10d2 = -9

Solving for variable 'd'.

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

Add '13' to each side of the equation.
-13 + 13 + 10d2 = -9 + 13

Combine like terms: -13 + 13 = 0
0 + 10d2 = -9 + 13
10d2 = -9 + 13

Combine like terms: -9 + 13 = 4
10d2 = 4

Divide each side by '10'.
d2 = 0.4

Simplifying
d2 = 0.4

Take the square root of each side:
d = {-0.632455532, 0.632455532}