Question

Complete the table of values for..

Answer 1

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

-
`(b)/(2a)`

x = -
`(1)/(2(1))` = -
`(1)/(2)` = - 0.5

y = ( - 0.5 )² + ( - 0.5 ) - 3 = - 3.25 = - 3
`(1)/(4)`

( -
`(1)/(2)` , - 3
`(1)/(4)` )