x^4 + 2002x^2 - 2001x + 2002
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\(x^4+2002x^2-2001x+2002\)
\(=x^4+2002x^2+x-2002x+2002\)
\(=\left(x^4+x\right)+\left(2002x^2-2002x+2002\right)\)
\(=x\left(x^3+1\right)+2002\left(x^2-x+1\right)\)
\(=x\left(x+1\right)\left(x^2-x+1\right)+2002\left(x^2-x+1\right)\)
\(=\left(x^2-x+1\right)\left[x\left(x+1\right)+2002\right]\)
\(=\left(x^2-x+1\right)\left(x^2+x+2002\right)\)
\(x^4+2002x^2+2001x+2002\)
\(=x^4+x^3-x^3+x^2-x^2+2002x^2+2002x-x+2002\)
\(=\left(x^4+x^3+x^2\right)-\left(x^3+x^2+x\right)+\left(2002x^2+2002x+2002\right)\)
\(=x^2\left(x^2+x+1\right)-x\left(x^2+x+1\right)+2002\left(x^2+x+1\right)\)
\(=\left(x^2+x+1\right)\left(x^2-x+2002\right)\)
Ta có: \(x^4+2002x^2+2001x+2002\)
= \(x^4+2002x^2+2002x-x+2002\)
= \(\left(x^4-x\right)+2002\left(x^2+x+1\right)\)
= \(x\left(x^3-1\right)+2002\left(x^2+x+1\right)\)
= \(x\left(x-1\right)\left(x^2+x+1\right)+2002\left(x^2+x+1\right)\)
= \(\left(x^2+x+1\right)\left[x\left(x-1\right)+2002\right]\)
=\(\left(x^2+x+1\right)\left(x^2-x+2002\right)\)
câu ở dưới mình ghi sai đề
x4+2002x2+2001x+2002
mk đang cần gấp lắm.mọi người giúp mk nha.ai nhanh tay nhất mk k cho
\(x^4+2002x^2+2001x+2002\)
\(=x^4+x^2+1+2001x^2+2001x+2001\)
\(=\left(x^4+2x^2+1\right)-x^2+2001\left(x^2+x+1\right)\)
\(=\left(x^2+1-x\right)\left(x^2+1+x\right)+2001\left(x^2+x+1\right)\)
\(=\left(x^2+x+1\right)\left(x^2+1-x+2001\right)\)
\(=\left(x^2+x+1\right)\left(x^2-x+2002\right)\)
\(x^4+2007x^2-2006x+2007\)
\(=x^4+2x^2+1-x^2+2006\left(x^2-x+1\right)\)
\(=\left(x^2+1\right)^2-x^2+2006\left(x^2-x+1\right)\)
\(=\left(x^2+1+x\right)\left(x^2+1-x\right)+2006\left(x^2-x+1\right)\)
\(=\left(x^2-x+1\right)\left(x^2+x+1+2006\right)\)
\(=\left(x^2-x+1\right)\left(x^2+x+2007\right)\)
a) \(x^5+x+1=\left(x^5+x+1\right)=x\left(x^4+1+\frac{1}{x}\right)\)
b) và c) Tương tự nha
Chả biết đúng hay sai :v tại dùng máy tính tính ra kết quả rồi phân tích ngược lại
a) \(x^5+x+1=x^5+x^4+x^3-x^3-x^2-x+x^2+x+1\)
\(=x^3\left(x^2+x+1\right)+x\left(x^2+x+1\right)-\left(x^2+x+1\right)\)
\(=\left(x^2+x+1\right)\left(x^3-x-1\right)\)
b)\(x^4+2002x^2+2001x+2002=x^4+x^3+1-x^3+x^2+x+2002x^2+2002x+1\)
\(=x^2\left(x^2+x+1\right)-x\left(x^2+x+1\right)+2002\left(x^2+x+1\right)\)
\(=\left(x^2-x+2002\right)\left(x^2+x+1\right)\)
c)Tương tự câu a),ta phân tích được:
\(x^{11}+x^7+1=\left(x^2+x+1\right)\left(x^9-x^8+x^6-x^4+x^3-x+1\right)\)
1,
x^5+x+1=(x^5−x^2)+(x^2+x+1)
=x^2(x^3 - 1) + (x^2 + x + 1)
=x^2(x-1)(x^2 + x + 1)+(x^2 + x + 1)
=(x^2 + x + 1).[x^2(x-1)+1]
2,tương tự
\(=\left(x^4+x^3+2002x^2\right)-\left(x^3-x^2+2002x\right)+x^2+x+2002\)
\(=x^2\left(x^2+x+2002\right)-x\left(x^2+x+2002\right)+x^2+x+2002\)
\(=\left(x^2-x+1\right)\left(x^2+x+2002\right)\)