Question

Find the value of x2 − 7x + 9 when x = 6.

The value of the expression when x = 6 is

Answer 1

-21.

Explanation:

(6)2-7(6)+9

--> 6x2= 12

--> 7x6= 42

Rewrite the expression:

--> 12-42+9

Solve:

--> 12-42= -30

--> -30+7= -21