40p^2-90=0

Solution for 40p^2-90=0 equation:

Simplifying
40p2 + -90 = 0

Reorder the terms:
-90 + 40p2 = 0

Solving
-90 + 40p2 = 0

Solving for variable 'p'.

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

Add '90' to each side of the equation.
-90 + 90 + 40p2 = 0 + 90

Combine like terms: -90 + 90 = 0
0 + 40p2 = 0 + 90
40p2 = 0 + 90

Combine like terms: 0 + 90 = 90
40p2 = 90

Divide each side by '40'.
p2 = 2.25

Simplifying
p2 = 2.25

Take the square root of each side:
p = {-1.5, 1.5}