Question

Find the sum and enter it in the box below. Enter your answer as a polynomialin descending order, and use the caret (1) for exponents. For example, youwould write 4x2 as 4x2.

Answer 1

-5x^5 - 3x^2 - 4x + 7

Step-by-step explanation:

To add the polynomial, we would collect like terms:

For constant = + 3 + (+4)

Multiplication of same sign gives positive number

3 + 4 = + 7

For x:

-2x + (-2x)

Multiplication of opposite signs give negative number.

= -2x - 2x = -4x

For x^2:

-4x^2 + (+x^2) = -4x^2 + x^2

= -3x^2

for x^3:

5x^3 + (-5x^3)

Multiplication of opposite signs give negative number.

= 5x^3 - 5x^3

= 0

we have only 1 term for x^5:

-5x^5 + 0 = -5x^5

combining the term together:

+7 - 4x - 3x^2 + 0 - 5x^5

= 7 - 4x - 3x^2 - 5x^5

In descending order:

-5x^5 - 3x^2 - 4x + 7