X2=0,64

Given that \( x^2 = 0,64 \), you can find the value of \( x \) by taking the square root of both sides: \[ x = \pm \sqrt{0,64} \] Since 0.64 is a decimal, it’s often easier to work with if you convert it to a fraction: \[ 0,64 = \frac{64}{100} = \frac{16}{25} \] Now, take the square root: \[ x = \pm \sqrt{\frac{16}{25}} = \pm \frac{\sqrt{16}}{\sqrt{25}} = \pm \frac{4}{5} \] **Answer:** \[ x = \pm \frac{4}{5} \]