Simplification & Approximation Mcqs

Q.  (0.9 * 0.9 – 0.8 * 0.8)/1.7 = _________?

a. 0.1
b. 0.2
c. 0.3
d. 0.4


ANSWER: See Answer
 
As numerator is of the form a² – b² = (a + b) (a – b), so the given expression simplifying becomes

(0.92 – 0.82)/(0.9 + 0.8) (0.9 + 0.8) (0.9 – 0.8)/0.9 + 0.8 = 0.1
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