(9x-7z)(9x+7z)=

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Solution for (9x-7z)(9x+7z)= equation:


Simplifying
(9x + -7z)(9x + 7z) = 0

Multiply (9x + -7z) * (9x + 7z)
(9x * (9x + 7z) + -7z * (9x + 7z)) = 0
((9x * 9x + 7z * 9x) + -7z * (9x + 7z)) = 0

Reorder the terms:
((63xz + 81x2) + -7z * (9x + 7z)) = 0
((63xz + 81x2) + -7z * (9x + 7z)) = 0
(63xz + 81x2 + (9x * -7z + 7z * -7z)) = 0
(63xz + 81x2 + (-63xz + -49z2)) = 0

Reorder the terms:
(63xz + -63xz + 81x2 + -49z2) = 0

Combine like terms: 63xz + -63xz = 0
(0 + 81x2 + -49z2) = 0
(81x2 + -49z2) = 0

Solving
81x2 + -49z2 = 0

Solving for variable 'x'.

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

Add '49z2' to each side of the equation.
81x2 + -49z2 + 49z2 = 0 + 49z2

Combine like terms: -49z2 + 49z2 = 0
81x2 + 0 = 0 + 49z2
81x2 = 0 + 49z2
Remove the zero:
81x2 = 49z2

Divide each side by '81'.
x2 = 0.6049382716z2

Simplifying
x2 = 0.6049382716z2

Take the square root of each side:
x = {-0.777777778z, 0.777777778z}

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