Question

X AO QUADRADO +7X+10=0

Answer 1

x²+7x+10=0 => b/c=7/10= 2+5/2•5

(x +2). (x+5)=0

x'= -2. x"= -5 <======©

Answer 2

x² + 7x + 10 = 0

Coeficientes:

A= 1

B= 7

C= 10

Delta:

∆= b² - 4ac

∆= 7² - 4 • 1 • 10

∆= 49 - 40

∆= 9

Fórmula de Bhaskara:

x= - b ± √∆ /2a

x= - 7 ± √9 /2 • 1

x= - 7 ± 3 /2

x'= - 7 + 3/2 = - 4/2 = - 2

x''= - 7 - 3/2 = - 10/2 = - 5

S= ( - 5 , - 2)