Question

Please help me in question B. Please I need you help. Don’t ignore

Answer 1

Answer:

a)  (x - 4)^2 + 4

Step-by-step explanation:

a) x^2 - 8x + 20

= (x - 4)^2 - 16 + 20

= (x - 4)^2 + 4

b) Find the minimum value of  the function

The function is a parabola  and

because the coefficient of x^2 is positive it opens upwards and will have a minimum value

(x - 4)^2 + 4 is the vertex form of the equation  and the minimum Value  is at the coordinates of the vertex:-  at  ((4,4). - so the minimum value is the y coordinate which is 4. Therefore it is always positive.