Dễ thôi!
- \(A\left(2\right)=2^2-2-2.2^4+5=-25\)
\(A\left(-1\right)=\left(-1\right)^2+1-2.\left(-1\right)^4+5=5\)
- \(B\left(1\right)=4.1^3+2.1^4-8.1-5-1^2=-8\)
\(B\left(-1\right)=4.\left(-1\right)^3+2.\left(-1\right)^4-8.\left(-1\right)-5-\left(-1\right)^2=0\)
+ \(A\left(2\right)=2^2-2-2.2^4+5\)
\(A\left(2\right)=-25\)
+ \(A\left(-1\right)=\left(-1\right)^2-\left(-1\right)-2.\left(-1\right)^4+5\)
\(A\left(-1\right)=5\)
Ý đề bài ra là vậy? Phải hông bạn?