Bjr
J = 15y + 2y-5+12= 17y +7
K = 20-1+3x²+4x²-8x+25x
K = 19 +7x² +17x
A =
[tex] \frac{2}{7} - \frac{3}{7} \times \frac{7 \times 2}{3 \times 3} = \frac{2}{7} - \frac{2}{3} = \frac{2 \times 3}{7 \times 3} - \frac{2 \times 7}{3 \times 7} = \frac{6}{21} - \frac{14}{21} = \frac{6 - 14}{21} = \frac{ - 8}{21} [/tex]
B =
[tex] \frac{ - 7}{8} \times ( \frac{2}{3} - \frac{3}{3} ) = \frac{ - 7}{8} \times \frac{ - 1}{3} = \frac{ 7}{24} [/tex]
C =
[tex] \frac{9}{2} - \frac{5}{2} \times \frac{8}{15} = \frac{9}{2} - \frac{5}{2} \times \frac{4 \times 2}{5 \times 3} = \frac{9}{2} - \frac{4}{3} = \frac{9 \times 3}{2 \times 3} - \frac{4 \times 2}{3 \times 2} = \frac{27}{6} - \frac{8}{6} = \frac{27 - 8}{6} = \frac{19}{6} [/tex]
