Simplification Test 1

Question : 35 of 40

Marks: +1, -0

(18.11)^2 - (14.9)^2 + (6.9)^3

= x - (11.1)^2

Choose the most appropriate value of x in the following questions: (You are not expected to calculate the exact value)

Solution:

x - (11.1)^2 =

(18.11)^2 - (14.9)^2 + (6.9)^3

x − 123.21= 327.97 -222.01 +328.50

x - 123 = 328 - 222 + 328

x - 123 = 656 - 222

x = 434 + 123

x = 557 ≈ 560

x = 560

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