Question

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$\frac{8.73 \times 8.73 \times 8.73 + 4.27 \times 4.27 \times 4.27}{8.73 + 8.73 - 8.73 \times 4.27 + 4.27 \times 4.27} = ?$
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Answer 1

Answer:

Let a = 8.73 and b = 4.27

Then, given expression =( a^3 + b^3 ) / ( a^2 - ab + b^2 )

As we Know the Algebra formula,

a^3 + b^3 = (a + b) (a^2 - ab + b^2)

Apply the above algebra formula in given above expression,

= (a + b) (a^2 - ab + b^2) / ( a^2 - ab+b^2)

= (a + b)

= 8.73 + 4.27

= 13