Question

Complete the table of values for..

Answer 1

Answer:

Step-by-step explanation:

y = x² + x - 3

x = - 3

y = ( - 3 )² + ( - 3 ) - 3 = 3

( - 3 , 3 )

x = 0 ⇒ y = - 3

( 0 , - 3 )

x = 1

y = ( 1 )² + ( 1 ) - 3 = - 1  

( 1 , - 1 )

(b). Coordinate x of the vertex of quadratic equation y = ax² + bx + c is

- $\frac{b}{2a}$

x = - $\frac{1}{2(1)}$ = - $\frac{1}{2}$ = - 0.5

y = ( - 0.5 )² + ( - 0.5 ) - 3 = - 3.25 = - 3$\frac{1}{4}$

( - $\frac{1}{2}$ , - 3$\frac{1}{4}$ )