Question

resolva as equações ​

Answer 1

Resposta:

a) x^ {2} - 2x = 0

a= 1

b = -2

c = 0

x=  (-2)^{2} + - √(-2)^{2} - 4.1.0 / 2.1

x= 4 +- √4- 0 /2

x= 4 +- 2/2

x 1 = 4 +2 /2 = 6/2 = 3

x2 = 4 - 2 /2 = 2/2 = 1

b)x^{2} + 5x = 0

a= 1

b= 5

c=0

x= -5 +- √ 5^{2} - 4. 1.0/ 2.1

x= -5 +- √25/ 2

x1 = -5 +(- 5) /2

x1= -10/2

x1 = -5

x2=  -5 - (-5)/2

x2 = 0/2

x2 = 0