Question

Root 72 - root 50 + root 128

Answer 1

Solution:

i) √72 = √(2×2)×2×(3×3)

= 2×3×√2 = 6√2

ii) √50 = √(5×5)×2 = 5√2

iii) √128 = √(2×2×2×2×2×2×2)

= 8√2

Now ,

√72 - √50 + √128

= 6√2 - 5√2 + 8√2

= (6-5+8)√2

= 9√2

Therefore,.

√72 - √50 + √128 = 9√2

•••

Answer 2

Answer:

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