Question

?/root128=root 162/?

Answer 1

Answer:

let unknown number be x

x/√128 = √162/x

by cross multiplication

x² = √128 ×√162

128 = 2×2×2×2×2×2×2

√128 = √2×2×2×2×2×2×2

= 8√2

162 = 2×3×3×3×3

√162 = √2×3×3×3×3

= 9√2

x² = 8√2 ×9√2

x² = 72×2

x²= 144

x= √144

x= 12

therefore unknown number is 12.