$\"\"$

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The equation is $\"\"$ .

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For any real number b and for any positive integer n, $\"\"$ .

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$\"\"$

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$\"\"$ (Subtract 2 from each side)

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$\"\"$

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$\"\"$

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Divide each side by 4.

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$\"\"$

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$\"\"$

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Squaring on each side and eliminate square roots.

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$\"\"$

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$\"\"$

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$\"\"$

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CHECK:-

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To check the solution, substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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0 = 0

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The solution is true. $\"\"$

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The value of z is $\"\"$ .