Question

the square root of 0.64 - 2 × 0.48 + 0.36 is...ans is 0.2

Answer 1

yes the answer is 0.2
0.64-2×0.48+0.36=0.04
square root of 0.04 is 0.2

Answer 2

Solution :

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We know the algebraic identity :

a² - 2ab + b² = ( a - b )²

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Here ,

0.64 - 2 × 0.48 + 0.36

= ( 0.8 )² - 2× 0.8 × 0.6 + ( 0.6 )²

= ( 0.8 - 0.6 )²

= ( 0.2 )²

Now ,

√ ( 0.64 - 2×0.48 + 0.36 )

= √( 0.2 )²

= 0.2

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