Sinz
Multiply the expressions, and simplify.
(8x3y-3) · (3x3y-3)
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lilg132
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actually i'll let thomas do this one =)
Sinz
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okay
Walleye
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do you know how to distribute?
Sinz
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some what yeah
Walleye
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this is just a distribution problem but it will take a little longer to compute
Sinz
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okay help me to start it and I should be able to figure it out I know 8*3 =24
Sinz
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do you add like exponents
Walleye
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sure your first term will be (8x3y * 3x3y)
Walleye
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let me expand it out for you and then you can try to see the patteren
Sinz
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okay
Walleye
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\[(8x3y-3) * (3x3y-3) = (8x3y*3x3y) + (8x3y*-3) + (-3*3x3y) +(-3*-3)\]
Walleye
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did my eqaution go off the screen for you?
Sinz
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yeah
Walleye
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haha sorry the part that is cut off is +(-3 * -3)
Walleye
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all I did was FOIL it out. Now you have to go about simplying it.
Sinz
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yeah but what about the exponents the problem was (8x^3y^-3) · (3x^3y^-3) sorry didn't see that when I posted it
Sinz
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don't you add the exponents when multiplying the main part of the problem
Walleye
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ah no problem you can slip them into the problem
when you mutiply two exponents with the same base you can add the exponents
for example
\[x^3 * x^5 = x^8\]
Sinz
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okay so then it is 24x^6y^-6 correct
Walleye
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yes!!!!
Walleye
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well done! that one can get messy
Sinz
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okay thought it was right but wasn't sure thanks again
Sinz
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yeah especially when it is posted wrong
Sinz
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I think I have found a new website for tutoring
Sinz
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everyone is so helpful