Question

If y=29,find x

y=(x+2)(x-2)
Please show working

Answer 1

`√(33)`

Explanation:

y = (x+2) (x-2)

y =
`x^(2)` +2x -2x-4

y =
`x^(2)` - 4

29 =
`x^(2)` - 4

29 + 4 =
`x^(2)` -4 + 4

33 =
`x^(2)`

`√(33)` = x

Hope this is clear and you can understand it. :)

Answer 2

x=±sqrt (33)

Explanation:

y=(x+2)(x-2)

29=x^2-4. x^2=33, x=±sqrt (33)