Question

A=x-2 b=x-3 c=x+1 d= x+5

a) a.b
b) b.c
c) a.b.c
d)b.c.d
e) c.b.a
f)c..d.a
g) d.c
h)c.a.b


pls quero a resposta

Answer 1

a) (x-2 ). (x-3)= x²-3x-2x+6= x²-5x+6
∆= b²-4ac
∆= (-5x)² - 4.1.6
∆= 25-24= 1
x= -b±√∆ / 2a
x= 5±1/2
x¹= 5+1/2= 6/2= 3
x²= 5-1/2= 4/2= 2

b) (x-3) . (x+1)= x²+x -3x-3= x²-2x-3
∆= b²-4ac
∆= (-2)² -4.1.(-3)
∆= 4+12= 16
x= -b±√∆/2a
x= 2±4/2
x¹= 2+4/2= 6/2= 3
x²= 2-4/2= -2/2= -1
(faça o mesmo nas outras )