Answer:
mi español no es tan bueno si hay algún error en esto entonces lo siento
cursos en diferencial = a, b, c
cursos de álgebra = p, q, r
conjunto de estudiantes tomando ambos = {(a, p), (a, q), (a, r), (b, p), (b, q), (b, r), (c,p),(c,q),(c,r)}.
Step-by-step explanation:
márcame como el más inteligente
4.
A and D are opposite.
A is in the negative side and d is in the positive side.
{-1.7, 3.5}
I find it convenient to graph the difference of the two sides of the equation. That difference is zero when the equation is satisfied. This equation has two solutions, near x = -1.7 and x = 3.5.