To find the value of y:
STEPS:
1) make the equation.
This is the formula you'd use for this one:
NT^2 = NU(NU+UM)
2) Using the formula above, substitute using the values provided in the diagram:
y² = 9(9+3)
3) Simplify on the right side:
y² = 9(12)
y² = 108
4) do square root on both sides of the equation to get rid of the y² on the left side:
√y² = √108
5) Now simplify the square root of 108- break 108 down into smallest possible numbers:
y = √2x2x3x3x3
6) simplify
y = 2x3√3
y= 6√3
So y=6√3- option 2 is correct.
