Question

simplify: 12√18_ 6√128_ 3√80 + 8√45​

Answer 1

Solution:

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i) √18 = √(3×3)×2 = 3√2

ii) √128 = √(8×8)×2 = 8√2

iii ) √80 = √(4×4)×5 = 4√5

iv) √45 = √(3×3)×5 = 3√5

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Now ,

12√18 -6√128-3√80+8√45

= 12(3√2)-6(8√2)-3(4√5)+8(3√5)

= 36√2-48√2-12√5+24√5

= (36-48)√2 +(-12+24)√5

= -12√2+12√5

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Answer 2

HOPE IT HELP U . This is the answer sorry for the late .