What is the remainder when the polynomial 5x^2+10x−15 is divided by x + 5?
did you try dividing? no.. as you clearly tried nothing
\(5x^2 + 10x - 15 = (x+5) 5x -(15x+15) \\ -(15x+15) = -15(x+5) +60 \\ 5x^2 + 10x - 15 = (15x-15)(x+5) + 60 \\ \text{The remainder is 60}\)
