Question

a)3x^2=1,47 б)x^2=10

Answer 1

Только так! И никак иначе

Answer 2

$3x^2=1.47 \ x^{2} =1.47:3 \ x^{2} =0.49 \ x= sqrt{0.49} \ x_{1}= -0.7 \ x_{2}=0.7 \ \ x^2=10 \ x_{1}=- sqrt{10} \ x_{2}= sqrt{10}$