Question

Tìm x 

\(100+x^2=181\)

ai k mk mk k lại nha

Answer 1

100 + x² = 181

x² = 181 - 100

x² = 81

x² = 9² = (-9)²

=> \(x\in\left\{9;-9\right\}\)

Answer 2

\(100+x^2=181\)

\(x^2=181-100\)

\(x^2=81\)

=> x = 9 hay x = -9

ai k mk mk k lại

Answer 3

\(100+x^2=181\)

\(x^2=181-100\)

\(x^2=81=9^2=\left(-9\right)^2\)

\(\Rightarrow\hept{\begin{cases}x=9\\x=-9\end{cases}}\)

Answer 4

x²=181-100

x²=81

Mà 9.9=81 nên x=9

k nha

Answer 5

100 + x² = 181

=> x² = 181-100 = 81

=> x = 9 

Answer 6

x=9 hoặc x=-9