Algebra Examples

$\frac{{(2.1)}^{2} - 2 \cdot 2.1}{{(2.1)}^{2} - 4}$

Step 1

Simplify the numerator.

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Step 1.1

Raise $2.1$ to the power of $2$ .

$\frac{4.41 - 2 \cdot 2.1}{{2.1}^{2} - 4}$

Step 1.2

Multiply $- 2$ by $2.1$ .

$\frac{4.41 - 4.2}{{2.1}^{2} - 4}$

Step 1.3

Subtract $4.2$ from $4.41$ .

$\frac{0.21}{{2.1}^{2} - 4}$

Step 2

Simplify the denominator.

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Step 2.1

Raise $2.1$ to the power of $2$ .

$\frac{0.21}{4.41 - 4}$

Step 2.2

Subtract $4$ from $4.41$ .

$\frac{0.21}{0.41}$

Step 3

Divide $0.21$ by $0.41$ .

$0.\overline{51219}$