EX1:
[tex]A=\frac{3}{\frac{17}{5}} \\ \\A=3*\frac{5}{17} \\ \\A=\frac{15}{17} \\ \\B=\frac{7}{5} + \frac{\frac{7}{5}}{\frac{30}{5}} \\ \\B=\frac{7}{5} + \frac{7}{5} * \frac{5}{30} \\ \\B=\frac{7}{5} + \frac{35}{150} \\ \\B = \frac{42}{30} + \frac{7}{30} \\ \\B=\frac{49}{30}[/tex]
EX2:
[tex]C = 4(x-7) \\C=4*x+4*(-7) \\C=4x-28 \\ \\D=x(x+2) \\D=x*x+x*2 \\D=x^{2}+2x \\ \\E=4x(2x-1) \\E=4x*2x+4x*(-1) \\E=4*2*x*x-4x \\E=8x^{2}-4x[/tex]
