root 128 + root 320
Answers
Answered by
1
Answer:
Explanation:
Simplify:
√
128
=
√
16
×
√
8
→
4
×
√
4
×
√
2
=
8
√
2
.
√
32
=
√
16
×
√
2
=
4
√
2
8
√
2
+
4
√
2
=
12
√
2
Answer link
AltairSafir
May 2, 2018
√
128
+
√
32
=
2
⋅
√
12
Explanation:
√
128
+
√
32
Write both numbers as a product of prime numbers.
(unique factorisation ).
For example:
my pic
my pic
128
=
2
⋅
64
=
2
⋅
2
⋅
32
32
=
2
⋅
16
=
2
⋅
2
⋅
8
=
2
⋅
2
⋅
2
⋅
4
=
2
5
=
2
4
⋅
2
√
128
+
√
32
=
√
2
⋅
2
⋅
32
+
√
32
=
=
√
2
⋅
2
⋅
√
32
+
√
32
=
2
⋅
√
32
+
√
32
=
=
3
⋅
√
32
=
3
⋅
√
2
4
⋅
2
=
3
⋅
√
2
4
⋅
√
2
=
3
⋅
2
2
⋅
√
2
=
=
3
⋅
4
⋅
√
2
=
12
√
2
Answer link
Tony B
May 2, 2018
12
√
2
Explanation:
Given:
√
128
+
√
32
You are looking for squared values that you can 'extract' from the roots.
If you are ever not sure do a quick sketch of a prime factor tree to help:
Tony B
Tony B
√
128
+
√
32
√
2
2
×
2
2
×
2
2
×
2
+
√
2
2
×
2
2
×
2
ddddd
8
√
2
dddddd
+
dddd
4
√
2
dddd
=
d
12
√
2
Answer link
Answered by
1
Step-by-step explanation:
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