Question

Equações:
a) x² - 49 = 0
b) x² - 12x = 0
c) x² - 1 = 0

Answer 1

a) x² - 49 = 0
   x² = 49
   x = 7

b)x² - 12x = 0
  x(x - 12) = 0
x=0 ou x = 12

c) x² - 1 = 0
    x² = 1
     x=1

Answer 2

a)
$x^{2} -49=0 \\ x^{2} =49 \\ x=\pm \sqrt{49} \\ x=\pm7$

b)
$x^{2} -12x=0 \\ x(x-12)=0 \\ x=0~~~~~~~~~~~~~~x=12$

c)
$x^{2} -1=0 \\ x^{2} =1 \\ x=\pm \sqrt{1} \\ x=\pm1$