triangle XBA similar to triangle BCAtriangle XCB similar to triangle BCAlook hereSo triangle XCB is similar to triangle XBA So CX / XB = XB / AX 4 / XB XB / 12 XB^2 = 48 XB = sqrt (48) = 4 sqrt (3)
triangle XBA similar to triangle BCA
triangle XCB similar to triangle BCA
look here
So
triangle XCB is similar to triangle XBA
CX / XB = XB / AX
4 / XB XB / 12
XB^2 = 48
XB = sqrt (48) = 4 sqrt (3)
Thanks for explanation
Since the balls are indistinguishable, we can think about this problem as placing 4 identical labels into 8 distinct boxes. The first label can be placed in any of the 8 boxes, the second label can be placed in any of the remaining 7 boxes, and so on. So 8×7×6×5=1680.
The square root of a complex number is another complex number whose square is equal to the given complex number. The square of i is −1, but there is no complex number whose square is i. Therefore, i does not have any square roots among the complex numbers.
