What is ((2.1)^2-4)/((2.1)-2) ?

The solution to ((2.1)^2-4)/((2.1)-2) is 4.1

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simplify ((2.1)^2-4)/((2.1)-2)

simplify

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

4.1

Solution steps

\frac{2. 1 ^{2} - 4}{( 2.1 ) - 2}

Apply rule:

(a) = a

(2.1) = 2.1

= \frac{2. 1 ^{2} - 4}{2.1 - 2}

Factor

2. 1^{2} - 4 : (2.1 + 2) (2.1 - 2)

= \frac{( 2.1 + 2 ) ( 2.1 - 2 )}{2.1 - 2}

\frac{( 2.1 + 2 ) ( 2.1 - 2 )}{2.1 - 2} = \frac{4.1 \cdot 0.1}{0.1}

= \frac{4.1 \cdot 0.1}{0.1}

Cancel the common factor:

0.1

= 4.1

- \frac{3}{2} + \frac{3}{4}

(- 3 + - 4)^{2}

6 t^{2} - 5.4 - 3.5 t + 2.5 t^{2} + 3 t

(4 a^{4})^{\frac{3}{2}}

16 (7 b + 6)