Question

用适当的方法解下列方程9(m-2)²=5 x(x+2)=195

Answer 1

9(m-2)^2=5

(m-2)^2=(√5/3)^2

m=2±√5/3

m1=2+√5/3 m2=2-√5/3

x(x+2)=195

x^2+2x+1=196

(x+1)^2=14^2

x=-1±14

x1=13 x2=-15