Select the correct answer. What is the simplified form of this expression? (9x2 + 10x + 4) − (9x2 + 5x − 1) A. x2 + 5x + 5 B. x2 + 15x + 3 C. 15x + 3 D. 5x + 5

Step-by-step explanation:

9x2 + 10x + 4 - 9x2 - 5x + 1

5x + 5

Option D is the correct answer

D. 5x + 5

Step-by-step explanation:

(9x^2 + 10x + 4) − (9x^2 + 5x − 1) =

Drop the first set of parentheses since they are unnecessary.

Distribute the negative sign to the left of the second set of parentheses. All signs inside the parentheses change.

= 9x^2 + 10x + 4 − 9x^2 - 5x + 1

Combine like terms.

= 9x^2 - 9x^2 + 10x - 5x + 4 + 1

= 5x + 4

D. 5x + 5

the answer to the expression is 83

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!