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If x+y=7/10 and x-y=5/14 then x^2-y^2=?
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If x+y=7/10 and x-y=5/14 then x^2-y^2=?

User Nicolas Tyler
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1 Answer

6 votes
  • x+y=7/10=0.7
  • x-y=5/14≈0.3

Add both

  • 2x=1
  • x=1/2=0.5

Put in first one

  • y=0.7-0.5
  • y=0.2

Find

  • x²+y²
  • (0.5)²+(0.2)²
  • 0.25+0.04
  • 0.29
User Varunpatil
by
4.7k points
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