What is expand (d-1/n)^2 ?

The solution to expand (d-1/n)^2 is (d^2n^2-2dn+1)/(n^2)

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expand (d-1/n)^2

expand

(d - \frac{1}{n})^{2}

\frac{d ^{2} n ^{2} - 2 d n + 1}{n ^{2}}

Solution steps

(d - \frac{1}{n})^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(d - \frac{1}{n})^{2} = d^{2} - 2 d \frac{1}{n} + (\frac{1}{n})^{2}

= d^{2} - 2 d \frac{1}{n} + (\frac{1}{n})^{2}

Simplify

d^{2} - 2 d \frac{1}{n} + (\frac{1}{n})^{2} : \frac{d ^{2} n ^{2} - 2 d n + 1}{n ^{2}}

= \frac{d ^{2} n ^{2} - 2 d n + 1}{n ^{2}}

\frac{( - 10 x ^{3} + 30 x - 20 )}{( - 5 x + 5 )}

6.75

20 \cdot 1 0^{- 3}

(x a + a x)^{2}

(3 - 5 i) + (7 + 3 i)

What is expand (d-1/n)^2 ?
The solution to expand (d-1/n)^2 is (d^2n^2-2dn+1)/(n^2)