Question

решить уравнения;

х²-16=0
1/9 - х²=0
а²-0.25=0
в²+36=0
4х²-9=0
81х²+4=0

Answer 1

$x^2-16=0 \ x^2=16 \ x=pm 4$

$frac{1}{9}-x^2=0 \ x^2= frac{1}{9} \ \ x=pm frac{1}{3}$

$a^2-0.25=0 \ a^2=0.25 \ a=pm 0.5$

$b^2+36=0 \ b^2=-36 \ b in emptyset$

$4x^2-9=0 \ 4x^2=9 \ x^2= frac{9}{4} \ \ x=pm frac{3}{2}$

$81x^2+4=0 \ x^2=- frac{4}{81} \ x in emptyset$