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kphung76127
You're trying to find the value of y that would result in 8^-2. When you multiply terms with the same base, you can add the exponents. 3+-5=-2 and -2-(-2) equals 0, so therefore y is equal to 0.
musiclover10045

when multiplying you add the powers

 3 +-5 = -2  so the power for y = 0

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