Question

Tem que ser por fatoração.

Answer 1

Resposta:

12: $4x {}^{2} - 12x + 9 = 9 \\ (2x - 3 ) {}^{2} = 0 \\ 2x - 3 = 0 \\ 2x = 3 \\ x = \frac{3}{2}$

Answer 2

Resposta:

a) 4x^2-12x+9= 0

(2x-3)^2= 0

(2x-3).(2x-3)=0

2x-3=0

2x= 3

x'=3/2

x"= 3/2.

S= {3/2}

b) 9x2+6x+1=0

(3x+1)^2=0

(3x+1).(3x+1)0

3x+1=0

3x=-1

x'= -1/3

x"=-1/3

S= {-1/3}