Question

What is the sum of the polynomials?

(6x+7+x2)+(2x2-3)

-x^2 +6x+4, 3x^2 +6x+4, 9x+4, 9x^2 +4

Answer 1

3x ² + 6x + 4

Explanation:

( 6x + 7 + x² ) + ( 2x² -3 )

• Remove unnecessary parantheses

6x + 7 + x² + ( 2 x² - 3 )

6 x + 7 + x² + 2x ² - 3

• subtract the numbers

6 x + 7 - 4 + x² + 2x²

• collect like terms

6x + 4 + 3x²

• use the commutative property to reorder the terms

3x ² + 6x + 4

Answer 2

9514 1404 393

Answer:

(b) 3x^2 +6x+4

Explanation:

(6x+7+x^2)+(2x^2-3)

= (1 +2)x^2 +(6)x +(7 -3) . . . . combine like terms

= 3x^2 +6x +4