(7h-3)(7h+3)=0

Solution for (7h-3)(7h+3)=0 equation:

Simplifying
(7h + -3)(7h + 3) = 0

Reorder the terms:
(-3 + 7h)(7h + 3) = 0

Reorder the terms:
(-3 + 7h)(3 + 7h) = 0

Multiply (-3 + 7h) * (3 + 7h)
(-3(3 + 7h) + 7h * (3 + 7h)) = 0
((3 * -3 + 7h * -3) + 7h * (3 + 7h)) = 0
((-9 + -21h) + 7h * (3 + 7h)) = 0
(-9 + -21h + (3 * 7h + 7h * 7h)) = 0
(-9 + -21h + (21h + 49h2)) = 0

Combine like terms: -21h + 21h = 0
(-9 + 0 + 49h2) = 0
(-9 + 49h2) = 0

Solving
-9 + 49h2 = 0

Solving for variable 'h'.

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

Add '9' to each side of the equation.
-9 + 9 + 49h2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 49h2 = 0 + 9
49h2 = 0 + 9

Combine like terms: 0 + 9 = 9
49h2 = 9

Divide each side by '49'.
h2 = 0.1836734694

Simplifying
h2 = 0.1836734694

Take the square root of each side:
h = {-0.428571429, 0.428571429}