Question

Write whether 2root45+3root20/2root5 on simplification gives a rational number or irrational number

Answer 1

Answer:

2√45+3√20/2√5;

=√5×[2√45+3√20/2√5];

=√5×(2√45+3√20/2)/2×(√5×√5);

=2√45·5+3√20·5/2×5;

=2√9·5·5+3√4·5·5/10;

=2√9·25+3√4·25/10;

=2×3×5+3×2×5/10;

=30+30/10;

=60/10;

hope it helps you...

Answer 2

A. T. Q

2√45+3√20÷2√5=

6√5+6√5÷2√5

12√5÷2√5

=6

so it is irrational

please mark me brainliest and next time please use brackets as it confuses people I knew this question so here is your answer