What is expand ((y+2)(y-2))/4 ?

The solution to expand ((y+2)(y-2))/4 is (y^2)/4-1

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expand ((y+2)(y-2))/4

expand

\frac{( y + 2 ) ( y - 2 )}{4}

\frac{y ^{2}}{4} - 1

Solution steps

\frac{( y + 2 ) ( y - 2 )}{4}

Expand

(y + 2) (y - 2) : y^{2} - 4

= \frac{y ^{2} - 4}{4}

Apply the fraction rule:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{y ^{2} - 4}{4} = \frac{y ^{2}}{4} - \frac{4}{4}

= \frac{y ^{2}}{4} - \frac{4}{4}

Apply rule

\frac{a}{a} = 1

\frac{4}{4} = 1

= \frac{y ^{2}}{4} - 1

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8.4 \cdot (1 - \frac{1}{3} \cdot (\frac{63 , 5 - 40}{65 - 40}))

What is expand ((y+2)(y-2))/4 ?
The solution to expand ((y+2)(y-2))/4 is (y^2)/4-1