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i have this for my math review & i just don't seem to get it...

what is (.9x+.8y)^2

User Alek Davis
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1 Answer

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Can you take the quantity [ x + y ] and square it ?

Can you take the quantity [ x + 2y ] and square it ?

Then you should have no trouble with the square of (.9x + .8y) .

The square of any binomial (expression with 2 terms) is

(square of the first term)
+ (square of the second term)
+ 2 times (product of the terms) .
User Dotvav
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