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Help with question 47 please

Help with question 47 please
asked 40.7k views
3 votes
Help with question 47 please

Help with question 47 please-example-1
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User Royh
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1 Answer

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\bf (x-y)^2\implies x^2-2xy+y^2\qquad \begin{cases} x^2=25\\ x=√(25)\\ x=5\\ -----\\ y^2=9\\ y=√(9)\\ y=3 \end{cases} \\\\\\ (25)-2(5)(3)+(9)\implies 25-30+9
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User Plasmer
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