Solve the following system of equations and show all work. y=2x2+7y=2x2+7 y=5x+10y=5x+10

My "work" is to enter the equations into a graphing calculator and let it show me the answers--just as your "work" is to copy the question to .

The solutions are
  (x, y) = (-0.5, 7.5)
  (x, y) = (3, 25)

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When you equate the expressions for y, you get the quadratic
  2x² -5x -3 = 0
  (2x +1)(x -3) = 0
  x = -1/2 or 3
  y = 5(x +2) = 15/2 or 25