Question

sem resolver as equacoes, calcule a soma e o produto das raizes
a) x²-5x+6=0
b) x²-6x+9=0
c) 2x²-10x-12=0
d) 3x²+10x+3=0

Answer 1

a) x²-5x+6=0

p= c/a

p= 6/1 = 6

S = b/ a

S = 5/1 = 5

P= 3.2 = 6

S = 3 +2 = 5

S = { 3 , 2 }

b) x²-6x+9=0

p = c/a

p= 9/1 = 9

s =b/a

s = 6/1 = 6

p= 3.3 = 9

S= 3+ 3 = 6

s= { 3, 3}

c) 2x²-10x-12=0

p = c/a

p = -12/2 = -6

s= b/a

s= -10/2 = -5

p= -3.-2 = -6

s= -3+ (-2)

s= -3 -2 = - 5

s= { -3, - 2 }