141

a)
$\begin{array}{l|l} &3x^2+3x+1\\ \hline x+5&3x^3+18x^2+16x+5\\ &3x^3+15x^2\\ &---------\\ &3x^2+16x+5\\ &3x^2+15x\\ &---------\\ &x+5\\ &x+5\\ &---------\\ &0 \end{array}$
b)
$\begin{array}{l|l} &x^2-2x-7\\ \hline x-2&x^3-3x-2\\ &x^3-2x^2\\ &------\\ &-2x^2-3x-2\\ &-2x^2-4x\\ &------\\ &-7x-2\\ &-7x-2\\ &------\\ &0 \end{array}$
c)
$\begin{array}{l|l} &x^2-\frac{7}{3}x+\frac{10}{9}\\ \hline 3x^2-2x&3x^4-5x^3+8x^2-4x+2\\ &3x^4-2x^3\\ &------\\ &-7x^3+8x^2\\ &-7x^3+\frac{14}{3}x^2\\ &------\\ &\frac{10}{3}x^2-4x+2\\ &\frac{10}{3}x^2-\frac{20}{9}x\\ &------\\ &\frac{16}{9}x+2 \end{array}$
$x^2-\frac{7}{3}x+\frac{10}{9}{,}\ jää\ \frac{16}{9}x+2$