Question

x+3x^2-1 divided by x-1​

Answer 1

Answer :-

$\frac{x + 3 {x}^{2} - 1}{x - 1} \\ \\ = > \frac{(x - 1) + 3 {x}^{2} }{(x - 1) } \\ \\ cancel \:( x - 1) \\ we \: will \: get... \\ = 3 {x}^{2}$

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Answer 2

$\large\sf\underline{Answer\::}$

$\sf\:\frac{x+3x^{2}-1}{x-1}$

$\sf\to\:\frac{3x^{2}+x-1}{x-1}$

$\sf\to\:\frac{3x^{2}+(x-1)}{x-1}$

$\sf\to\:\frac{3x^{2}+\cancel{(x-1)}}{\cancel{x-1}}$

Remainder = $\sf\color{blue}{3x^{2}}$

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Thnks :))