Question

Can someone check this?

What is the value of y?



4y^2 + 8 = 264

I got 8.1 by doing 264/4 then to the square root but i feel like im suppose to do something is the ^2

Answer 1

almost

Answer 2

you need to isolate 4y^2 by subtracting 8 from both sides first

Answer 3

oh
so like 4y^2-8=264-8?

Answer 4

4y^2 + 8 - 8 = 264 - 8

4^2 = 256

y^2 = 64

Answer 5

(don't forget there's already a + 8 in the problem)

Answer 6

so y^2 = 64

y = +8 or - 8

Answer 7

Ok thank you.