. a) Construye un polinomio completo de grado seis, de forma tal que los monomios de grado par tengan coeficiente racional y los de grado impar tengan coeficiente irracional.
b) Construye un polinomio completo de grado tres, de forma tal que, en cada monomio, la diferencia entre el coeficiente y el exponente sea siempre igual a 2,3.
c) Construye un polinomio mónico A(x) de grado par mayor que seis, con sus demás coeficientes distintos y no enteros. Construye otro polinomio B(x) de un grado menor que el de A(x), con coeficientes tales que C(x) A(x) + B(x) tenga todos sus monomios mónicos.

Doesn't make sense try again

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!