a) [tex]2x^2=18[/tex]
Dividimos ambos lados entre 2
[tex]\frac{2x^2}{2}=\frac{18}{2}[/tex]
Simplificamos
[tex]x^2=9[/tex]
[tex]x=\sqrt{9},\:x=-\sqrt{9}[/tex]
[tex]\sqrt{9}:3[/tex]
[tex]-\sqrt{9}:-3[/tex]
[tex]x=3,\:x=-3[/tex]
b) [tex]-4x^2=-1[/tex]
[tex]\frac{-4x^2}{-4}=\frac{-1}{-4}[/tex]
[tex]x^2=\frac{1}{4}[/tex]
[tex]x=\sqrt{\frac{1}{4}},\:x=-\sqrt{\frac{1}{4}}[/tex]
[tex]\sqrt{\frac{1}{4}}:\frac{1}{2}[/tex]
[tex]-\sqrt{\frac{1}{4}}:-\frac{1}{2}[/tex]
[tex]x=\frac{1}{2},\:x=-\frac{1}{2}[/tex]
c) [tex]x^2=7[/tex]
[tex]x=\sqrt{7},\:x=-\sqrt{7}[/tex]
[tex]Buena\:suerte\:con\:tus\:tareas\::ProfeAndresFelipe :)[/tex]
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RESOLVER:
a) [tex]2x^2=18[/tex]
Dividimos ambos lados entre 2
[tex]\frac{2x^2}{2}=\frac{18}{2}[/tex]
Simplificamos
[tex]x^2=9[/tex]
[tex]x=\sqrt{9},\:x=-\sqrt{9}[/tex]
[tex]\sqrt{9}:3[/tex]
[tex]-\sqrt{9}:-3[/tex]
[tex]x=3,\:x=-3[/tex]
b) [tex]-4x^2=-1[/tex]
[tex]\frac{-4x^2}{-4}=\frac{-1}{-4}[/tex]
[tex]x^2=\frac{1}{4}[/tex]
[tex]x=\sqrt{\frac{1}{4}},\:x=-\sqrt{\frac{1}{4}}[/tex]
[tex]\sqrt{\frac{1}{4}}:\frac{1}{2}[/tex]
[tex]-\sqrt{\frac{1}{4}}:-\frac{1}{2}[/tex]
[tex]x=\frac{1}{2},\:x=-\frac{1}{2}[/tex]
c) [tex]x^2=7[/tex]
[tex]x=\sqrt{7},\:x=-\sqrt{7}[/tex]
[tex]Buena\:suerte\:con\:tus\:tareas\::ProfeAndresFelipe :)[/tex]