(1):34m^2-27(m+9)-5=179(1)32(x-4)x+x(x-2)=7(5-x)(2):x^2=9a^2-x+7ax(a为常数)(2)3n^2=n(7-4n)/10-3(n^2+2n)(3)9-a(2-a)+4a^2=0(3)abx^2+b(b-2a)x-b(b-2a)x^2=b^2(a,b为实数)(4)7a+6a(2-a)=a*a(4)9x+6x(2-a)=x^2(5)(m-n)x^2+9x-m^2=0(m,n=R)(5)7x^2+9(2-x)=x*(x-12)
刘根辉
2019-06-13 13:32:44
点赞0