Question 1050339
Use ^ (Shift 6) for multiply, not x
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6^-4 * 6^7
Add the exponents
= {{{6^(-4+7) = 6^3}}}
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10^8 * 10^-5
Same as the 1st one.
x^7 * x^3
Same as the 1st one.
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(x^-2)^3
Multiply the exponents.
= x^(-2*3) = x^-6
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Y^-12 * y^5
Same as the 1st one.
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7^2 Divided by 7^-4
Subtract the exponents when dividing.
= {{{7^(2+4) = 7^6}}}
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Or 7^2/7^4
= {{{(7^2/7^4)*(7^4/7^4) = 7^6/7^0 = 7^6}}}