(7y+5)(7y-5)=

Solution for (7y+5)(7y-5)= equation:

Simplifying
(7y + 5)(7y + -5) = 0

Reorder the terms:
(5 + 7y)(7y + -5) = 0

Reorder the terms:
(5 + 7y)(-5 + 7y) = 0

Multiply (5 + 7y) * (-5 + 7y)
(5(-5 + 7y) + 7y * (-5 + 7y)) = 0
((-5 * 5 + 7y * 5) + 7y * (-5 + 7y)) = 0
((-25 + 35y) + 7y * (-5 + 7y)) = 0
(-25 + 35y + (-5 * 7y + 7y * 7y)) = 0
(-25 + 35y + (-35y + 49y2)) = 0

Combine like terms: 35y + -35y = 0
(-25 + 0 + 49y2) = 0
(-25 + 49y2) = 0

Solving
-25 + 49y2 = 0

Solving for variable 'y'.

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

Add '25' to each side of the equation.
-25 + 25 + 49y2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 49y2 = 0 + 25
49y2 = 0 + 25

Combine like terms: 0 + 25 = 25
49y2 = 25

Divide each side by '49'.
y2 = 0.5102040816

Simplifying
y2 = 0.5102040816

Take the square root of each side:
y = {-0.714285714, 0.714285714}