Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Item 160

Without Solving for a Variable

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If \(x^2+y^2 = 196\) and \((x-y)^2 = 36\), what is the value of \(xy\)?

  1. -116

  2. -80

  3. -8

  4. 80

  5. 160



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Epiphany
SAT
SAT

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