数学计算题,八年级上(1)(5a+6b-7c)^2-(5a-6b+7c)^2(2)(2x-3y-1)(2x+3y+1)(3)[-(1/2a^2x)^2+(1/3ax^2*ax)]÷(-1/6ax)(4)已知x^m=9,x^n=6.x^k=4求x^m-2n-2k(5)a^a-3=1,求a的可能值(6)若3x^2-x=1,求6x^3+7x-5x+2009
数学计算题,八年级上
(1)(5a+6b-7c)^2-(5a-6b+7c)^2(2)(2x-3y-1)(2x+3y+1)(3)[-(1/2a^2x)^2+(1/3ax^2*ax)]÷(-1/6ax)
(4)已知x^m=9,x^n=6.x^k=4求x^m-2n-2k(5)a^a-3=1,求a的可能值(6)若3x^2-x=1,求6x^3+7x-5x+2009