solve for d. sq root d^2-11=5

Question

A. 4,-4
B. 5,-5
C. 5,6
D. 6,-6
I think it is A....?

justastudent · Answer

It is not A, its D. 6,-6

cassie · Answer

thanks. can you show me how to do it?

Steve · Answer

√(d^2-11) = 5 d^2-11 = 25 d^2 = 36 ...