Question

Answer 1

\(a,x^2=9\\ =>\left[{}\begin{matrix}x=-3\left(kothoaman\right)\\x=3\left(thoanman\right)\end{matrix}\right.\\ b,x^3=64\\ x^3=4^3\\ x=4\\ c,\left(2x+1\right)^2=5^2\\ 2x+1=5\\ 2x=4\\ x=2\\ d,\left(x+2\right)^3=3^3\\ x+2=3\\ x=1\)

Answer 2

a: =>x=căn 9=3 hoặc x=-3

b: =>x=4 hoặc x=-4

c: =>2x+1=5 hoặc 2x+1=-5

=>x=2 hoặc x=-3

d: =>x+2=3

hay x=1

e: =>(x+2)³=8

=>x+2=2

hay x=0

f: =>(x-2)²(x-3)=0

=>x=2 hoặc x=3