Question

.If a and b are the zeroes of the quadratic polynomial f(x)=x²−4x+3, find the value of a²+b²-ab

Answer 1

Step-by-step explanation:

x2-4x+3=0

x2-3x-x+3=0

x(x-3)-1(x-3)=0

(x-3)(x-1)=0

x=3or x=1

now a2+b2-ab

9+1-3=7