2a-3b^2=-1,2a+3b^2=5,则9b^4-4a^2=?
2个回答
(2a-3b^2)(2a+3b^2)=5*-1=-5=-9b^4+4a^2
9b^4-4a^2=5
相关问题
(3a^2+1/2b)(3a^2-1/2b)(9a^4-1/4b^2)
(a^2+b^3)(2a^2+2b^3)(3a^2+3b^3)(4a^2+4b^3)(4a^2+4b^3)(5a^2+5
计算(3a^2+2/1b)(3a^2-2/1b)(9a^4+4/1b^2)
若4a^2+9b^2=13,2a-3b=5,则对于正整数n,代数式4a^2n+3.(2b^2n+1+4.5b^2n+5)
紧急!1.(a^2+3)(a-2)-a(a^2-2a-2)=?2.(3/5a^5b^3+9/5a^7b^4-9/2a^5
2(2a²+9b)+3(-5a²-4b)
x3-5x2+5x-4x5+1/4x9a4+11a2b2+4b4(a2-5b2)2+(4ab)2a2-2a+4b-4b2
1、若2b+3b=4,3a-2b=5,则10a+2B=
(-1/3a^3b^2)^2*(-2ab^2)^3/(-1/9a^4b^4)^2
已知:2a+3b=4,3a-2b=5,则-7a+9b=? 速度!