Answer:
Step-by-step explanation:
hello :
let : X1 and X2 this solution you have : X1 + X2 = -b/a
but given : -b/2a = 1 so : -b/a = 22
now : X1 + X2 = 2
other solution is : -2 because f(-2) =0
so : -2+X2 = 2 X2 = 4
f(x) = (x-4)(x+2) = x²-2x-8 a=1 and b=- 2 and c= -8
verify : f(-2) = (-2)²-2(-2)-8=8-8=0....right
-b/2a = -(-2)/2(1) = 1 ...right
the soultions are : 4 and -2
