Is the claim true or false?

a) [[$ \sqrt {10} = 5 $]]

The claim is true false.

b) [[$ \sqrt {49} = –7 $]]

The claim is true false.

c) [[$ \sqrt {36} = 6 $]]

The claim is true false.

d) [[$ \sqrt {18} = 9 $]]

The claim is true false.