Question

Resolvendo a equação -2ײ+72=0​

Answer 1

veja

2 x^{2} -72=02x

2

−72=0

2 x^{2} =722x

2

=72

x^{2} =72\div2x

2

=72÷2

x^{2} =36x

2

=36

x=\pm \sqrt{36}x=±

36

x=\pm6x=±6

S={-6,6