Powers and Roots Practice Test 4

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Question : 4 of 40

Marks: +1, -0

Find x in:

√3364+√{40+x^3}=74 .

5
-4
-6
6
-5

Solution:

√3364+√{40+x^3}=74

58+√{40+x^3}=74

√{40+x^3}=74 -58=16

Squaring both sides,

{40+x^3} =256

x^3=216

x=6

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