Question

2 (x - 3) = -3 ((x - 3) 2

vamos lá ??ajudinha aq ???

Answer 1

2.(x-3)= -3.[(x-3)²] ?
2x-6= -3.[(x-3).(x-3)]
2x-6= -3.[x²-3x-3x+9]
2x-6= -3x²+9x+9x-27
2x-6= -3x²+18x-27
-3x²+18x-27-2x+6=0

-3x²+16x-21=0

/\=16²-4.(-3).(-21)
/\=4

x'= -16+2 /-6
x'= -14/-6
x'= 7/3

x"= -16-2 /-6
x"= -18/-6
x"=3

S={7/3, 3}