Question

Simplify root72+ root800 - root18

Answer 1

Given :

√72 + √800 - √18

Simplify the numbers

= √( 2 × 2 × 2 × 3 × 3 ) + √( 2 × 2 × 2 × 2 × 2 × 5 × 5 ) - √( 2 × 3 × 3 )

= ( 2 × 3 √2 ) + ( 2 × 2 × 5 √2 ) - ( 3 √2 )

= 6√2 + 20√2 - 3√2

= 26√3 - 3√2

= 23√2

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Answer 2

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