meg115
meg115
28-09-2017
Mathematics
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help with question 47 please
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jdoe0001
jdoe0001
28-09-2017
[tex]\bf (x-y)^2\implies x^2-2xy+y^2\qquad \begin{cases} x^2=25\\ x=\sqrt{25}\\ x=5\\ -----\\ y^2=9\\ y=\sqrt{9}\\ y=3 \end{cases} \\\\\\ (25)-2(5)(3)+(9)\implies 25-30+9[/tex]
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