(9y^2-1)(9y^2+1)=

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Solution for (9y^2-1)(9y^2+1)= equation:


Simplifying
(9y2 + -1)(9y2 + 1) = 0

Reorder the terms:
(-1 + 9y2)(9y2 + 1) = 0

Reorder the terms:
(-1 + 9y2)(1 + 9y2) = 0

Multiply (-1 + 9y2) * (1 + 9y2)
(-1(1 + 9y2) + 9y2 * (1 + 9y2)) = 0
((1 * -1 + 9y2 * -1) + 9y2 * (1 + 9y2)) = 0
((-1 + -9y2) + 9y2 * (1 + 9y2)) = 0
(-1 + -9y2 + (1 * 9y2 + 9y2 * 9y2)) = 0
(-1 + -9y2 + (9y2 + 81y4)) = 0

Combine like terms: -9y2 + 9y2 = 0
(-1 + 0 + 81y4) = 0
(-1 + 81y4) = 0

Solving
-1 + 81y4 = 0

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + 81y4 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 81y4 = 0 + 1
81y4 = 0 + 1

Combine like terms: 0 + 1 = 1
81y4 = 1

Divide each side by '81'.
y4 = 0.01234567901

Simplifying
y4 = 0.01234567901

Reorder the terms:
-0.01234567901 + y4 = 0.01234567901 + -0.01234567901

Combine like terms: 0.01234567901 + -0.01234567901 = 0.00000000000
-0.01234567901 + y4 = 0.00000000000

The solution to this equation could not be determined.

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