First you would simplify the equation (7x²+2x+5)+(3x²-8x-10) lets start with the first part (7x²+2x+5) 7x² + 2x which = 49x + 2x which also = 51x Then you add the last part (+5) 51x + 5 Now you simplify the last part. (3x²-8x-10) 3x²-8x which=9x - 8x which also = 1x or simply x Then add the last part (-10) Which you'll get x-10 51x + 5) + (x - 10) = 52x -5 so your answer is 52x - 5
