Question

What is the value of the expression 9x2 - 12x + 4 when x = 3?

22
49
O
85
d
697

Answer 1

9514 1404 393

Answer:

(b) 49

Explanation:

Put the value where x is in the expression and do the arithmetic.

9x² -12x +4 for x=3

9·3² -12·3 +4 = 9·9 -36 +4

= 81 -36 +4 = 49