0=x^2-3x-28 gives x=7 or x=-4. These are the x-intercepts. The y-intercept is when x is 0. y=(0)^2-3(0)-28. The y-intercept is -28.
F(x) is basically the output or y of whatever x is
A rhombus is a parallelogram with equal sides
8 - (2 + 5)8 - (2 + 5)
= 8 - 7*8 - 7
= 8 - 7 - 56
= -55 <------ Harry's answer
Terry's answer = 67