Question

x² - (-5/36)= 14/36

Answer 1

\(x^2-\left(-\frac{5}{36}\right)=\frac{14}{36}\)

          \(x^2+\frac{5}{36}=\frac{14}{36}\)

                        \(x^2=\frac{14}{36}-\frac{5}{36}\)

                        \(x^2=\frac{1}{4}\)

\(\Rightarrow x\in\left\{\frac{-1}{2};\frac{1}{2};\frac{1}{-2};\frac{-1}{-2}\right\}\)

Vậy \(x\in\left\{\frac{-1}{2};\frac{1}{2};\frac{1}{-2};\frac{-1}{-2}\right\}\)

Answer 2

\(x^2-\left(\frac{-5}{36}\right)=\frac{14}{36}\Rightarrow x^2=\frac{14}{36}+\left(\frac{-5}{36}\right)=\frac{14}{36}-\frac{5}{36}=\frac{9}{36}=\frac{1}{4}\)

\(\Rightarrow x^2=\frac{1}{4}\Rightarrow x^2=\pm\left(\frac{1}{2}\right)^2\)

vậy x = \(\frac{1}{2}\) hoặc x = \(\frac{-1}{2}\)

Answer 3

X\(^2\)-(-5/36)=14/36

X.x=14/36+(-5/36)

X.x =19/36