Hi;

I have the equations y = 2x^2 - 2x +3 and y = x^2 + 5x -7 therefor they are both equal so set them equal and solve I'm ok with that but...

I thought I could set them both to zero and solve for x by elimination ie

2x^2 - 2x + 3 = 0

x^2 + 5x - 7 = 0

giving

2x^2 - 2x = -3

x^2 + 5x = 7

multiplt the second equation by 2

2x^2 - 2x = -3

2x^2 + 10x = 14

I thought this would let me eliminate the x^2 terms and solve for x but I get the wrong solution and I don't know why?

Thanks