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Expand the product \(4r(2r - 4)\)

 Jul 13, 2022
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Expand the product 

 

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\(4r(2r-4) \color{blue}=8r^2-16r\\ =8r(r-2)=r(8r-16)=8(r-1)^2-8\)

laugh  !

 Jul 13, 2022

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