Step-by-step explanation:
Evaluate f(x) = x^2 - 5x , where f(4)
=> f(4) = (4)^2 - 5(4)
=> f(4) = 16 - 20
=> f(4) = -4.
Answer:
Hope this helps
4(x²+14x+49)-49+13=0
4x²+56x+196-49+13=0
4x²+56x+160=0
D=3136-2560=576
x1=-56+24/8=-4
x2=-56-24/16=-10
ATTACHED IS THE SOLUTION!!