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Simplifying
25z2 = 81
Solving
25z2 = 81
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Divide each side by '25'.
z2 = 3.24
Simplifying
z2 = 3.24
Take the square root of each side:
z = {-1.8, 1.8}
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