Question

09. Resolva as equações incompletas:
a) x2-81=0
b) 6x2-216 = 0​

Answer 1

Explicação passo-a-passo:

a)

$x^{2} -81=0\\\\x^{2} =81$

$x=$±$\sqrt{81}$

$x=$±$9$

V={-9;9}

b)

$6x^{2} -216=0\\\\6x^{2} =216\\\\ x^{2} =\frac{216}{6} \\\\x^{2} =36$

$x=$±$\sqrt{36}$

$x=$±$6$

V={-6;6}