Answer:
Yes
Step-by-step explanation: If you multiply all the number by the power of 2, you'll see that the two lower numbers equal up to the higher number.
x = 19.42
Step-by-step explanation:
8²+x²=21²
64+x²=441
-64 -64
x²=377
x=19.41648784
rounded is 19.42
230.
Hope this helps!
In the photo below.
try -3
