Question

Mng giúp mìnhhhh ạ

Answer 1

2:

1: P(1)=-3+2+1=0

Q(1/2)=-3/4+1/2-2=-1/4-2=-9/4

2: M(x)=P(x)-Q(x)

=-3x^2+2x+1+3x^2-x+2

=x+3

3: M(x)=0

=>x+3=0

=>x=-3

4: P(x)=Q(x)

=>2x+1=x-2

=>x=-3