The value of $\frac{(2.7)^3-(2.2)^3}{(2.7)^2+2.7×2.2+(2.2)^2}$ is |
4.9 0.5 0.05 0.49 |
0.5 |
The correct answer is Option (2) → 0.5 The expression is in the form: $\frac{a^3 - b^3}{a^2 + ab + b^2}$ where:
We know the identity for the difference of cubes is: $a^3 - b^3 = (a - b)(a^2 + ab + b^2)$ By rearranging this formula, we get: $\frac{a^3 - b^3}{a^2 + ab + b^2} = a - b$ Substituting the values of $a$ and $b$ back into the simplified expression: $\text{Value} = 2.7 - 2.2$ $\text{Value} = 0.5$ |