Answer:
Option 4
Step-by-step explanation:
Given: If x=6, what is the smallest natural number y that makes x2+y2 rational .
To Find: Smallest value if y so that the expression is rational .
Solution : On substituting x = 6 , we have
Now for the whole expression has minimum value y^2 should be minimum , also y should be natural no. The set of Natural no. is ,

Therefore the smallest Natural no. is 1 . Therefore minimum value of y is 1.
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Answer:
x=17
Step-by-step explanation:
So if you look at CZD you will see that it equals a right angle. So the equation would be 3x+39=90
1.) Subtract the 39 from 90
2.) You will be left with 51 so then you divide that by the 3 in 3x
3.) You will be left with 17 so that will be your answer
5rs^2(4r^2+5s)
The GCF in this polynomial is 5rs^2.