Question

phân tích thành nhân tử : x⁴+2015x²+2014x²+2015

Answer 1

trả lời

xx^4+2015x^2+2014x+2015=x^4+2015x^2+2015x-x+2015=x\left(x^3-1\right)+2015\left(X^2+x+1\right)=x\left(x-1\right)\left(x^2+x+1\right)+2015\left(x^2+x+1\right)=\left(x^2+x+1\right)\left(x^2-x+2015\right)xx4+2015x2+2014x+2015=x4+2015x2+2015x−x+2015=x(x3−1)+2015(X2+x+1)=x(x−1)(x2+x+1)+2015(x2+x+1)=(x2+x+1)(x2−x+2015)

hc tốt

Answer 2

\(x^4+2015x^2+2014x+2015\)

\(=\left(x^4-x\right)+2015x^2+2015x+2015\)

\(=x\left(x^3-1\right)+2015\left(x^2+x+1\right)\)

\(=x\left(x-1\right)\left(x^2+x+1\right)+2015\left(x^2+x+1\right)\)

\(=\left(x^2+x+1\right)\left(x^2-x+2015\right)\)