taranicolee
can someone answer this quick question, i am having a brain bubble.... for 2(5x-4)^2 would you foil 5x-4 thennn multiply it by 2 or should i multiply thennn foil?
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anonymous
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"foil" first
order 'o operations say exponents first, multiplication second
anonymous
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\[2(5x-4)(5x-4)\]in other words
taranicolee
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so i would take (10x^2-20x-20x+16) and multiply it by two to get 20x^2+80x+32?
anonymous
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yes, except that that is not correct
anonymous
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the first term is wrong since \(5x\times 5x=25x^2\) and not \(10x^2\)
taranicolee
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hahah oooops. 5 x 5 is 25....
taranicolee
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yeah hahah. ooopsie. but thank you so much!!
anonymous
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also the middle term should be \(-80x\) not \(+80x\)
taranicolee
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thank you! ((:
anonymous
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yw