(9c-7w)(9c+7w)=

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Solution for (9c-7w)(9c+7w)= equation: 


Simplifying
(9c + -7w)(9c + 7w) = 0

Multiply (9c + -7w) * (9c + 7w)
(9c * (9c + 7w) + -7w * (9c + 7w)) = 0
((9c * 9c + 7w * 9c) + -7w * (9c + 7w)) = 0

Reorder the terms:
((63cw + 81c2) + -7w * (9c + 7w)) = 0
((63cw + 81c2) + -7w * (9c + 7w)) = 0
(63cw + 81c2 + (9c * -7w + 7w * -7w)) = 0
(63cw + 81c2 + (-63cw + -49w2)) = 0

Reorder the terms:
(63cw + -63cw + 81c2 + -49w2) = 0

Combine like terms: 63cw + -63cw = 0
(0 + 81c2 + -49w2) = 0
(81c2 + -49w2) = 0

Solving
81c2 + -49w2 = 0

Solving for variable 'c'.

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

Add '49w2' to each side of the equation.
81c2 + -49w2 + 49w2 = 0 + 49w2

Combine like terms: -49w2 + 49w2 = 0
81c2 + 0 = 0 + 49w2
81c2 = 0 + 49w2
Remove the zero:
81c2 = 49w2

Divide each side by '81'.
c2 = 0.6049382716w2

Simplifying
c2 = 0.6049382716w2

Take the square root of each side:
c = {-0.777777778w, 0.777777778w}

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