Question

rationalize 15 upon under root 10 + under root 20 + under root 40 minus under root 5 minus under root 80​

Answer 1

Answer:

=15/√10+√20+√40-√5-√80

=15/√10+2√5+2√10-√5-4√5

=15/3√10-3√5

=15/3√10-3√5×3√10+3√5/3√10+3√5

=45√10+45√5/90-45

=45√10+45√5/45

=45(√10+√5)/45

=√10+√5

I think it's help you...