1.(a-2b-3c)^2 2.a^4-(a^2+2b^2)(a^2-2b^2) 3.化简求值(m-3)(m+3)-(m
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1.(a-2b-3c)^2 2.a^4-(a^2+2b^2)(a^2-2b^2) 3.化简求值(m-3)(m+3)-(m-3)^2其中m=-1
![1.(a-2b-3c)^2 2.a^4-(a^2+2b^2)(a^2-2b^2) 3.化简求值(m-3)(m+3)-(m](/uploads/image/z/8407841-41-1.jpg?t=1.%28a-2b-3c%29%5E2+2.a%5E4-%28a%5E2%2B2b%5E2%29%28a%5E2-2b%5E2%29+3.%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%28m-3%29%28m%2B3%29-%28m)
1.原式=a^2+4b^2+9c^2-4ab-6ac+12bc
2.原式=a^4-(a^4-4b^4)=4b^4
3.原式=m^2-9-(m^2-6m+9)=6m-18=-6-18=-24
2.原式=a^4-(a^4-4b^4)=4b^4
3.原式=m^2-9-(m^2-6m+9)=6m-18=-6-18=-24
1.(a-2b-3c)^2 2.a^4-(a^2+2b^2)(a^2-2b^2) 3.化简求值(m-3)(m+3)-(m
分解因式a^2(m-b)(m-c)(c-b)+b^2(m-c)(m-a)(a-c)+c^2(m-a)(m-b)(b-a)
计算:(b-a)^5(a-b)^m+(a-b)^(m+3)(b-a)^2
计算:(a-b)^m+3(b-a)^2(a-b)^m(b-a)^5
计算:(a-b)^(m)*(a-b)^(2)*[2(b-a)]^3*[(b-a)^(5)]^(2)/(a-b)^(m).
计算(a-b)^m(a-b)[2(b-a)]^3[(b-a)^5]^2÷(a-b)^m=
-12a^2m-1b^m+1+20a^m-1b^2m+3
因式分解12:m²-3m+2=(m+a)(m+b),a=( ),b=( )
A.3M+N B.2M+2N C.M+N D.M+3N
已知平面a,b和直线m,给出条件:1m//a,2,m垂直a,3,m包含于a,4,a垂直b,5,a//b.
已知平面a,b和直线m,给出条件:1m//a,2,m垂直a,3,m包含于a,4,a垂直b,5,a//b
a*b=b-a分之a+b,且3*m=2,求m