Question

1. Simplify the expression: 4√18+5√32
A.45√2
B.32√2
C.116√2
D.9√50

2. Simplify the expression: 7√5-3√80
A.-5√5
B.-4√75
C.-5
D.4√-75

3. Simplify the expression: √21(√3+√14)
A.9√7-49√6
B.2√6+√35
C.3√7+7√6
D.√357

4.Simplified by rationalizing the denominator: 4/√10-√6
A.√10+√6
B.4
C.4√10+4√6
D.4√10-4√6/16-2√15

The think the answers is
1.B
2.A
3.C
4.A
please correct me if I'm wrong

Answer 1

Correct

Answer 2

can you explain please @FaiqRaees

Answer 3

Explain why are you correct?

Answer 4

what are the multiples of 18