The lines below are perpendicular. if the slope of the green line is -5, what is slope of the red line?

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

With #! i’ve tried to figure it out but i can’t.

What is the definition of exponential decay?