Each of Tony’s items are $7.65
Each of Tanyas items are $10.2
The y has to be negative but the x positive. So that leaves only (3,-4)
We can cosider this to be a difference of 2 squares so
4x^4 - 9x^2 = (2x^2 - 3x)(2x^2 + 3x) so D is one answer
also we could take x^2 out and get
x^2(4x^2 - 9) = C
