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1 vote
What is the answer for 4y^2=81

2 Answers

3 votes

Answer:

y = ± 4.5.

Step-by-step explanation:

Given : 4y²=81

To find : Solve for y

Solution : We have given that

4y²=81

On dividing by 4 both sides

y²=
(81)/(4)

y²= 20.25

On taking square root both sides

y =
√(20.25)

y = ± 4.5

Therefore, y = ± 4.5.

User Jjn
by
8.0k points
3 votes
Answer:
either y = 4.5
or y = -4.5

Step-by-step explanation:
To get the solution, we will need to isolate the y on one side of the equation.
This can be done as follows:
4y² = 81


(4y^2)/(4) = (81)/(4)

y
² = 20.25

y = +/-
√(20.25)
either y = +
(20.25) = 4.5
or y = -
(20.25) = -4.5

Since there are no restrictions on the value of y, therefore, both answers would be accepted

Hope this helps :)
User Suneel Kumar
by
7.7k points

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