若P=a2+3ab+b2,Q=a2-3ab+b2,则代数式P-[Q-2P-(-P-Q)]=______.
已知集合P={X|X=a2+4a+1,a属于R},Q={y|y=-b2+2b+3,b属于R},求P交Q=_;P并Q的补集
化简:a2-3ab+4b2-(2b2-3ab-3a2)=______.
若a2+2b2=5,则多项式(3a2-2ab+b2)-(a2-2ab-3b2)的值是______.
已知 a1 a2 a3...an,b1 b2 b3 bn,p,q满足a1^2+a2^2+...+an^2=p^2,a1b
若P=a²+3ab+b²,Q=a²-3ab+b²,化简P-[Q-2P-(-P-Q
1.p^3-q^3=(p-q)[(p+q)^2-______].
已知a2-ab=15,ab-b2=-10,则代数式a2-b2=______.
已知集合P={x|x=a2;+4a+1,a∈R},Q={x|x=-b2;+2b+3,b∈R},求P∩Q.
a2+b2=2,那么代数式(a2-2ab-3b2)-(3a-2ab-b2)的值是?
若a2+b2=6,则式子(3a2-2ab-b2)-(a2-2ab-3b3)=______.
(3a2-3ab+2b2)+(a2+4ab-2b2)=4a2+ab+b2
先化简再求值:(p+2q)^2-2(p+2q)(p+3q)+(p+2q)(3q-p),其中p=-1,q=-2