What is ((1.9)^2-4)/((1.9)-2) ?

The solution to ((1.9)^2-4)/((1.9)-2) is 3.9

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simplify ((1.9)^2-4)/((1.9)-2)

simplify

\frac{( 1.9 ) ^{2} - 4}{( 1.9 ) - 2}

3.9

Solution steps

\frac{1. 9 ^{2} - 4}{( 1.9 ) - 2}

Apply rule:

(a) = a

(1.9) = 1.9

= \frac{1. 9 ^{2} - 4}{1.9 - 2}

Factor

1. 9^{2} - 4 : (1.9 + 2) (1.9 - 2)

= \frac{( 1.9 + 2 ) ( 1.9 - 2 )}{1.9 - 2}

\frac{( 1.9 + 2 ) ( 1.9 - 2 )}{1.9 - 2} = \frac{3.9 ( - 0.1 )}{- 0.1}

= \frac{3.9 ( - 0.1 )}{- 0.1}

Cancel the common factor:

- 0.1

= 3.9

(3 x^{2} + 5 x + 4) - (- x^{2} + 5 x - 6)

35 \cdot \frac{π}{180}

9 - 1^{2}

2 y + 2

1^{- \frac{1}{4}}