Question

arrange in vertical column and solve it
2x²+6x-9,5x²+7x-1,6x²+13x+21​

Answer 1

Answer:

40x³

Step-by-step explanation:

2x²+6x-9+5x²+7x-1+6x²+13x+21

(6x-7x+13x)+(2x²+5x²+6x²)+(9-1+21)

(6x-20x)+13x²+(9-22)

14x+13x²+13

40x³