A) 2.75
B) 9
C) 4.75
D) 8.5
Correct Answer: D
Solution :
Expression\[=\frac{8{{(3.75)}^{3}}+1}{{{(7.5)}^{2}}-6.5}\] \[=\frac{{{(2\times 3.75)}^{3}}+1}{{{(7.5)}^{2}}-7.5\times 1+{{1}^{2}}}\] \[=\frac{{{(7.5)}^{3}}+1}{{{(7.5)}^{2}}-7.5\times 1+{{1}^{2}}}\] \[[{{a}^{3}}+{{b}^{3}}=(a+b)({{a}^{2}}-ab+{{b}^{2}})]\] \[=7.5+1=8.5\]You need to login to perform this action.
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