Question

1. 1.86^1

Explanation:

Step1: Identify the expression

The expression is \(1.86^2\).

Step2: Calculate the square

To find the square of a number \(a\), we use the formula \(a^2=a\times a\). So, \(1.86^2 = 1.86\times1.86\).
Calculating \(1.86\times1.86\):
\[

$$\begin{align*} 1.86\times1.86&=(1 + 0.86)\times(1 + 0.86)\\ &=1\times1+1\times0.86 + 0.86\times1+0.86\times0.86\\ &=1 + 0.86+0.86 + 0.7396\\ &=1+1.72 + 0.7396\\ &=2.72+0.7396\\ &=3.4596 \end{align*}$$

\]

Answer:

\(3.4596\)