Question

if √21.414 then the value of √32​

Answer 1

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3√16×2-2√25×2+4√64×2-20√9×2

√ab can be written as √a ×√b

= 3×4√2-2×5√1+4×8√2-20×3√2

= 12√2-10√2+32√2-60√2

= 26√2

= 26×1.414

= 36.764.