Question

X^2-6x+9=25
Como resolver isso?

Answer 1

X^2 -6x+9-25=0
X^2-6x -16=0

∆=b^2-4a.c
∆=-6^2-4.1.(-16)
∆=36-4.(-16)
∆=36+64
∆=100

X=-b+-√∆\2.a
X= -(-6)+-√100\2.1
X=6+-10\2.1
X1= 6+10\2
16\2 =8

X2=6-10\2
-4\2 = -2