Which choice correctly shows the solution(s) of the equation x2 = 225?

A) x =
225
B) x = −
225
C) x = ±
15
D) x = ±
225

C)x = +/-15

Step-by-step explanation:

15x15=225

-15x-15=225

square root

step-by-step explanation:

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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