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
2 answers:
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
Answer: D. 5x + 5
Step-by-step explanation:
9x2 + 10x + 4 - 9x2 - 5x + 1
5x + 5
Option D is the correct answer
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