Question

计算 (-2ab)^2+(a^2-2b)^2-(a^2+b^2)(a^2-b^2) (3x-2)(x-3)-2(x-5)

Answer 1

(-2ab)^2+(a^2-2b)^2-(a^2+b^2)(a^2-b^2)=4a^b^+a^4-4a^b^+4b^4-(a^4-b^4)=5b^4.(3x-2)(x-3)-2(x-5)(x+6)-(x^2-7x+13)=3x^-11x+6-2(x^+x-30)-(x^2-7x+13)=3x^-11x+6-2x^-2x+60-x^+7x-13= -6x+53,x=3又1/2时原...