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jtvatsim
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you mean \[a^9\times a^{18} \] right?
jtvatsim
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Remember that exponents just mean to multiply a number by itself that many times. So you have 9 a's multiplying together and then 18 a's multiplying together. How many a's have you multiplied?
Chelsea04
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add the powers
a^m x a^n gives a^m+n
whpalmer4
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\[a^n*a^m=a^{n+m}\]
whpalmer4
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for example,
\[a^3*a^4 = (a*a*a)*(a*a*a*a) = a*a*a*a*a*a*a = a^7 = a^{3+4}\]
dman
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