Question

х^2-9у^2/х^2+6ху+9у^2 при х=10,4, у=13,2

Answer 1

  (х-3у)(х+3у)       х-3у                10,4-3*13,2       10,4- 39,6

=___________=__________=___________=___________=

     (х+3у)²              х+3у           10,4+3*13,2      10,4 +39,6

    -29,2

=_______= -0,584

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