I really need help on this question

-2√5 is the simplest radical form of the equation you posted.

Step-by-step explanation:

-√180 + 4√5

√180 = 6√5

= -6√5 + 4√5

= -2√5

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

~

the answer is 21%.