3.9 times 3.9=

asked by guest
on Jan 09, 2025 at 9:59 am



You asked:

Evaluate the expression: \(3.9 \cdot 3.9\)

MathBot Answer:

\[3.9 \cdot 3.9 = \frac{1521}{100} = 15.21\]

\[\begin{aligned}3.9 \cdot 3.9& = \left(3 + \frac{9}{10}\right) \cdot \left(3 + \frac{9}{10}\right)\\& = \frac{39}{10} \cdot \left(3 + \frac{9}{10}\right)\\& = \frac{39}{10} \cdot \frac{39}{10}\\& = \frac{1521}{100}\end{aligned}\]

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