已知:x^m=3,x^n=2,求3x^3m+2n-4x^2m的值

来源：学生作业帮助网编辑：作业帮时间：2024/11/17 17:41:05

已知:x^m=3,x^n=2,求3x^3m+2n-4x^2m的值
已知:x^m=3,x^n=2,求3x^3m+2n-4x^2m的值

已知:x^m=3,x^n=2,求3x^3m+2n-4x^2m的值
3x^(3m+2n)-4x^2m
=3x^(3m)*x^(2n)-4x^2m
=3(x^m)^3*(x^n)^2-4(x^m)^2
=3*3^3*2^2-4*3^2
=3*27*4-4*9
=324-36
=288

3x^3m+2n-4x^2m
=3×(x^m)³×(x^n)²-4×(x^m)²
=3×3³×2²-4×3²
=324-36
=288

x^m=3
x^2m=(x^m)^2=9
x^3m=(x^m)^3=27

x^n=2
x^2n=(x^n)^2=4

3x^3m+2n-4x^2m
=3*x^3m*x^2n-4*x^2m
=3*27*4-4*9
=324-36
=298

已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值已知x^m=1/3,x^n=2,求x^2m+3n 已知x^m=3,x^n=6,求x^(3m－2n) 已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值；（2）求x^3m-2n的值已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N 已知单项式M、N满足2x(M+3x)=6x^2y^2+N,求M、N. 已知,单项式M,N满足2x（M+3x)=6x²y²+N,求M,N 1.已知x^2 +mc+n=(x-2)(x-3),求m+n的值已知x的平方+mx+n=(x-2)(x-3)求m+n的值已知m=3x^2+2x-1,n=-x^2-2+3x,求m-2n 已知:M=3x²+2x-1,N=-x²-2+3x,求M-2N 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知x^m=2,x^n=5,求x^3m+x^2n的值? 已知x^2-4x+3=(x-1)^2+m(x-1)+n,求m、n的值已知x^(m+n) =57,x^m =19,求x^3n的值已知x^(m+n) =57,x^m =19,求x^3n的值已知单项式M N满足3x(M-5x)=6x^2y^2 求M N