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Roderick Matthews
Mathematics
21 May, 12:08
Find the product of (3x + 7y) ^2
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Roxie
21 May, 12:10
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So I do the box method
3x*3x = 9x^2
3x*7y = 21xy
7y*3x=21xy
7y*7y = 49y
Add together 21xy plus 21xy
So you are left with:
9x^2+42xy+49y
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Zaria Melendez
21 May, 12:25
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9x^2+42xy+49y in terms of (a+b) ^2
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