`(x-1)^2+5=30`
`(x-1)^2=30-5`
`(x-1)^2=25`
`(x-1)^2=5^2` hoặc `(x-1)^2=(-5)^2`
`x-1=5` hoặc `x-1=-5`
`x=6` hoặc `x=-4`
(x-1)^2 + 5 =30
(x-1)^2 = 30 - 5
(X-1)^2 = 25
(X-1)^2 = 5^2
X-1=5
X=5+1
X=6
(x−1)2+5=30(x-1)2+5=30
(x−1)2=30−5(x-1)2=30-5
(x−1)2=25(x-1)2=25
(x−1)2=52(x-1)2=52 hoặc (x−1)2=(−5)2(x-1)2=(-5)2
x−1=5x-1=5 hoặc x−1=−5x-1=-5
x=6x=6 hoặc x=−4