Question

√90 can be written as c√d , where d has no
perfect square factors and c and d are both
integers. Which of the following are equivalent
to d-c:
a. 1
b. 7
c. 13
d. 15
e. 19

Answer 1

\[\large \sqrt{90} = \sqrt{9*10}\]


\[\large \sqrt{90} = \sqrt{9}*\sqrt{10}\]


\[\large \sqrt{90} = 3\sqrt{10}\]

Answer 2

The answer you gave me is not a choice

Answer 3

I know, compare it to c√d and tell me what c and d are (the values of each)

Answer 4

i don't know because how i posed the problem is exactly how it was given to me

Answer 5

\[\large 3\sqrt{10} = c\sqrt{d}\]

Answer 6

c = ??
d = ??

Answer 7

so then the answer must be 7.

Answer 8

yep

Answer 9

thanks

Answer 10

np