Question

Giải gúp mk tí nhé

THU GỌN:(x^2+1)(x^4-x^2+1)

Answer 1

\(\left(x^2+1\right)\left(x^4-x^2+1\right)\)

\(=x^4x^2+1.x^4-\left(x^2\right)^2+1.x^2-1.x^2+1.1\)

\(=x^6+x^4-x^4+1\)

\(=x^6+1\)

Answer 2

bạn áp dụng HĐT:  \(a^3+b^3=\left(a+b\right)\left(a^2-ab+b^2\right)\)

\(\left(x^2+1\right)\left(x^4-x^2+1\right)\)

\(=\left(x^2\right)^3+1^3\)

\(=x^6+1\)