Question

$\sqrt{x + 3 - 9} = x$
Me ajudem nessa equação irracional

Answer 1

+3−9√=

x+3−9=x

−6√=

x−6=x

−6=2

x−6=x2

−6−2=0

x−6−x2=0

−2+−6=0

−x2+x−6=0

2−+6=0

x2−x+6=0

=−(−1)±(−1)2−4⋅1⋅6√2⋅1

x=−(−1)±(−1)2−4⋅1⋅62⋅1

=1±1−24√2

x=1±1−242

=1±−23√2

x=1±−232

∉ℝ