Question

Please help me solve for x

Answer 1

Hello from MrBillDoesMath!

Answer:

sqrt(6)

Discussion:

The triangle, while not indicated, appears to be a right triangle (i.e. has a 90 degree angle). If so, from the Pythagorean theorem,

x^2 + 3^2 =   ( sqrt(15) ) ^ 2  =>

x^2 + 9 = 15                          =>  ( subtract 9 from both sides)

x^2   = 15 - 9 = 6                  =>  (take the square root of both sides)

x= sqrt(6)

Regards,  

MrB