Question

Se propondrán los ejercicios de resolución de ecuaciones como las siguientes:
1) x²-4=0
2) x²-64=0
3) 2x²-72=0

Answer 1

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

${x}^{2} - 64 = 0 \\ {x}^{2} = 0 + 64 \\ {x}^{2} = 64 \\ x = \sqrt{64} \\ x = 8$

$2 {x}^{2} - 72 = 0 \\ 2 {x}^{2} = 0 + 72 \\ 2 {x}^{2} = 72 \\ {x}^{2} = \frac{72}{2} \\ {x}^{2} = 36 \\ x = \sqrt{36} \\ x = 6$