jerry40 jerry40
  • 05-03-2017
  • Mathematics
contestada

Evaluate the polynomial when x = 7 and y = -2

X^2 - y^2+xy

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ghanami
ghanami ghanami
  • 05-03-2017
Hello

Evaluate the polynomial  x²-y²+xy when x=7 and y=-2
(7)² - (-2)² +(7)(-2) = 49-4-14 =49-18 = 31
Important note : (-2)²=(-2)(-2) =4
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