the product of number 5 under root 3 and 21 under root 3 is
Answers
Answered by
1
Step-by-step explanation:
You know that for real, positive numbers you have
√
a
⋅
√
b
=
√
a
⋅
b
This means that you can write
√
3
⋅
√
21
=
√
3
⋅
21
If you write
21
as the product of its prime factors
3
and
7
, you can say that
√
3
⋅
21
=
√
3
⋅
3
⋅
7
=
√
9
⋅
7
Now use the same multiplication property of radicals to write
√
9
⋅
7
=
√
9
⋅
√
7
=
3
⋅
√
7
=
3
√
7
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Answered by
0
Answer:
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Step-by-step explanation:
ans: 22
Why I am not kept step by step because it is very hard to do..
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