Which value must be added to the expression x^2-3x to make it a perfect-square trinomial? a) 3/2 b) 9/4 c) 6 d) 9

Step-by-step explanation:

Here, the given equation,

Let y be the the value after adding the given equation will convert to a perfect square trinomial,

Also, a perfect square trinomial can be written as ( ax + b )² or ax² + 2abx+ b²,

That is,

By comparing,

a = 1, 2ab = -3,

⇒ 2(1)b = -3

⇒ b = -3/2

Hence, the value of y = = =

OPTION B is correct.

529 and 531

step-by-step explanation: