Find the value of which will make the quadratic expression 9y²-12y+k is a perfect square
a) 5
b) -4
c) 4
d) 9

The value of k must be[c] to make this quadratic equation a perfect square.

Step-by-step explanation:

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c)4

Step-by-step explanation:

9y²-12y+k

(3y)²-2*3*2*y+2²=(3y-2)²

k=2²=4

answer: it's d

step-by-step explanation:

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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