Dimitri is solving the equation x2 – 10x = 21. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial?

Step-by-step explanation:

Hello,

we can see that

is the beginning of

so we must add 5*5=25 to both sides of the equation to make the left side a perfect square trinomial

hope this helps

25.

Step-by-step explanation:

To find the value that will make the left side a perfect-square trinomial, you need to find (b/2)^2. In this case, b = -10.

(-10 / 2)^2

= (-5)^2

= (-5) * (-5)

= 25

Once you add 25 to both sides, the left side becomes x^2 - 10x + 25, which is equal to (x - 5)^2.

Hope this helps!

answer: plz put a pic in so i can answer it

step-by-step explanation:

your answer would be 12