Under which condition should you use cross products to solve a rational equation?

Select the quadratic that has root x = 8 and x = -5

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

[15 points]find the quotient with the restrictions. (x^2 - 2x - 3) (x^2 + 4x + 3) ÷ (x^2 + 2x - 8) (x^2 + 6x + 8)