Answer
Answer:
$2{x^5} + 3{x^4} + 4{x^3} + 9{x^2} + 7x + 6$
Work Step by Step
$(2{x^5} + 3{x^4} + 4{x^3} + 5{x^2}) + (4{x^2} + 7x + 6)$
=$2{x^5} + 3{x^4} + 4{x^3} + 5{x^2} + 4{x^2} + 7x + 6$
=$2{x^5} + 3{x^4} + 4{x^3} + 9{x^2} + 7x + 6$