Question

Answer 1

Thay P(-1) 

\(P\left(-1\right)=\left(-1\right)^4+2.\left(-1\right)^2+1\)

\(P\left(-1\right)=1+2.1+1\)

\(P\left(-1\right)=2\)

Thay P(\(\dfrac{1}{2}\))

\(P\left(\dfrac{1}{2}\right)=\left(\dfrac{1}{2}\right)^4+2.\left(\dfrac{1}{2}\right)^2+1\)

\(P\left(\dfrac{1}{2}\right)=\dfrac{1}{16}+2.\dfrac{1}{4}+1\)

\(P\left(\dfrac{1}{2}\right)=\dfrac{25}{16}\)

Thay Q(-2)

\(Q\left(-2\right)=\left(-2\right)^4+4.\left(-2\right)^3+2.\left(-2\right)^2-4.\left(-2\right)+1\)

\(Q\left(-2\right)=1\)

Thay Q(1)

\(\text{​​}\text{​​}\text{​​}\text{​​}Q\left(1\right)=1^4+4.1^3+2.1^2-4.1+1\)

\(Q\left(1\right)=1+4.1+2.1-4.1+1\)

\(Q\left(1\right)=4\)