What is the exact value of the expression √72 - √8 + √128? Simplify and explain how its possible ?.
a) 8√2
b) 12√2
c) 8√3
d) 12√3
Answers
Answered by
1
Root 72-root8+root 128
6root2-2root 2+8 root 2
14 root 2-2 root 2
12 root 2................... (b)
Answered by
3
√72 can be written as,
( √ ( 8 × 9 )
= 3√8 //
√128 as, √ ( 8 × 16 )
= 4√8
Here,
we have to solve √72 -√8 +√128
i.e, 3√8 - √8 + 4√8..
Which is equal to 6√8 or can be written as 12√2 //
.: The answer is (b)
( √ ( 8 × 9 )
= 3√8 //
√128 as, √ ( 8 × 16 )
= 4√8
Here,
we have to solve √72 -√8 +√128
i.e, 3√8 - √8 + 4√8..
Which is equal to 6√8 or can be written as 12√2 //
.: The answer is (b)
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