Question

calcule a soma e o produtos das raizes das equacoes. PRECISOOOO URGENTEEE

A) x²-7x+10=0

B) 2x²-10x-12

C) 8x²-7=0

D) 1+12x=9x²

Answer 1

x² - 7x + 10 = 0
a = 1
b = -7
c = + 10
S = -b/a = 7/1 = 7 **
P = c/a = 10/1 = 10 ****
2
2x² - 10x - 12 = 0
a= 2
b = -10
c = -12
S = 10/2 = 5 ***
P = -12/2 = -6 ***
3
8x² - 7 = 0
a = 8
b = 0
c = -7
S = 0/8 = 0 ***
P = -7/8 ***
4
1 + 12x = 9x²
1 + 12x - 9x² = 0
-9x² + 12x + 1 = 0
a = -9
b = +12
c = +1
S = -12/-9  = 12/9 = 4/3 ***
P = 1/-9 = - 1/9 ***