Question

a) x²+5x+6=0 R(-2,-3)

Answer 1

a= 1 b=5 c=6

∆ = b² -4 .a.c
∆= 5² - 4.(1).(6)
∆= 25-24
∆=1
x= -b± √∆ /2.a

x= -(5)±√1 /2.(1)

x'= -5 + 1 / 2 = -2
x" = -5- 1/ 2 = -3