已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值 急用!已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 18:23:54
![已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值 急用!已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值](/uploads/image/z/1025449-25-9.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%88x-1%29%28x%26%23178%3B%2Bmx%2Bn%29%3Dx%26%23179%3B-6x%26%23178%3B%2B11x-6%2C%E6%B1%82m%2Bn%E7%9A%84%E5%80%BC+%E6%80%A5%E7%94%A8%21%E5%B7%B2%E7%9F%A5%EF%BC%88x-1%29%28x%26%23178%3B%2Bmx%2Bn%29%3Dx%26%23179%3B-6x%26%23178%3B%2B11x-6%2C%E6%B1%82m%2Bn%E7%9A%84%E5%80%BC)
xP0)/!t$w''W|B6\w;Zw)&c:GPTA8.[+ӂTi^Σ/ej*/쯎3[OBL*J
de 1LK
p!N8i!h 0'$Kwwc9=qy[V(t(cxB=mn
已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值 急用!已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值
已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值 急用!
已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值
已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值 急用!已知(x-1)(x²+mx+n)=x³-6x²+11x-6,求m+n的值
(x-1)(x²+mx+n)
=x³+mx²+nx-x²-mx-n
=x³+(m-1)x²+(n-m)x-n
∴m-1=-6
n-m=11
-n=-6
∴m=-5
n=6
m+n=1
1
x3+mx2+nx-x2-mx-n=x3-6x2+11x-6
所以m-1=-6 n=6 所以m=-5 m+n=-5+6=1