Which of the following constants can be added to x^2-3x to form a perfect trinomial? a. 1 1/2 b. 2 1/4 c. 4 1/2

We want to make x^2-3x into a perfect square trinomial. An example of such a trinomial is x^2 + 6x + 9, which is equivalent to the square of (x+3).

From x^2-3x we see that the coefficient of x is -3. Divide this coefficient, -3, by 2, obtaining -3/2. Now square this result: square -3/2. Result: 9/4.

Adding 9/4 to x^2-3x makes x^2-3x into a perfect square trinomial.

40 x 50 = 2000

step-by-step explanation: