Page 18 - E booklet prep 3 bader 2025 b_Neat

Note:

we can find the vertex ( x , y ) of the curve by using the rule

x = -?? and y = f( -?? )
???? ????

Example :

Represent graphically the function f ( x ) = ???? + ???? + ??

Where x ? [ -4 , 2 ]

To find vertex

a=1 , b=2 , c =1

x = -?? y = 4 -4 + 1 = 1

?? ?? ??

= -2 v ( -2 , 1 )

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