Question

resuelve correctamente los siguientes ejercicios
a) x2 - 16 = 0
b)4x2 + 12x + 9 = 0
c) x2 + 4x + 4 = 0
d) 2x2 - 4x = 0

Answer 1

x² - 16 = 0 ↓↓

$x² - 16 = 0 \\ {x}^{2} = 0 + 16 \\ {x}^{2} = 16 \\ x = \sqrt{16} \\ x = 4$

4x² + 12x + 9 = 0 ↓↓

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

x² + 4x + 4 = 0 ↓↓

$x² + 4x + 4 = 0 \\ (x+2)(x+2)=0 \\ x+2=0  \: o \: \: x+2=0 \\ x=−2$

2x² - 4x = 0 ↓↓

${2x}^{2} - 4x = 0 \\ 2x(x−2)=0 \\ 2x=0  \: o \:  x−2=0 \\ x=0  \: o \:  x=2$