Question

¡¡¡urgente!!!! reporto si responden mal
doy corona

Answer 1

Respuesta:

Problema a:

$-8xy+5x^{3}y^{2} +25x^{2} y+5x^{2} y-3xy\\\\-11xy+5x^{3}y^{2} +30x^{2} y$

Problema b:

$ab^{2} -3a^{2}b+5ab^{2}-12a^{2} b+12\\\\6ab^{2}-15a^{2}b +12$

Problema c:

$\frac{1}{2}rs^{2}+3rs-\frac{1}{5} r+2rs^{2}-3rs+\frac{1}{7}r\\\\\frac{5}{2}rs^{2}-\frac{2}{35}r$

$SUMA\\\\\frac{1}{2}rs^{2} +2rs^{2} =\frac{1+4}{2}=\frac{5}{2} rs^{2} \\\\RESTA\\\\-\frac{1}{5}r+\frac{1}{7}r =\frac{-7+5}{35}=\frac{-2}{35}r$