What is the solution set of 4x^2-36= 0? (-3) (3) (-3,3)
2 answers:
Answer:
(-3, 3)
Step-by-step explanation:
The equation is:
to clear for x, first we move the -36 to the right as a +36 (or you can also say that we add 36 to both sides):
dividing by 4:
taking the square root:
±
we add the ± because a square root has two solutions, a positive one, and a negative one.
Then we get:
± 3
The solutions are -3 and +3
which is represented in the option (-3, 3)
You might be interested in
We have been given that Grant spent $2.50, $4.00, $4.25, and $3.25 on breakfast in one week. The next week he spent $6 more in total for the 4 breakfasts than the week before. We are asked to find increase in the mean of second week.
Since Grant spent $6 more than last week, we will divide 6 by 4 to get how much mean of second week breakfast expenditures increased with respect to first week expenditures.
Therefore, mean of second week breakfast expenditure will be $1.5 more than first week.