Question

(x-3)²=16 me ajudem?

Answer 1

(x-3)²=16

=x² +9=16

=x²=16-9

=x²=7

Answer 2

x²+2*x*(-3)+(-3)²=16

x²-6x+9=16

x²-6x-7=0

b²-4*a*c

(-6)²-4*(1)*(-7)

36+28 =64

-b+-sqrt(64)/2*a

-(-6)+-8/2*1

(6+-8)/2

x'=(6+8)/2=7

x''=(6-8)/2=-1