Question

5. Discuss the signs of the following quadratic expressions when x is real.
(i) x2 - 5x+4
(ii) x2-x+3​

Answer 1

Answer:

i)x2-5x+4=0

x2-1x-4x+4=0

x(x-1)-4(x-1)=0

(x-4)(x-1)=0

x is positive.....

when x-4=0

x=4

and when x-1=0

x=1

ii)x2-x+3

x2