Dimitri is solving the equation x^2 - 10x = 21. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial?

a. 0

b. 4

c. 25

d. 100

Question

Mathematics

Litzy Harper

21 July, 09:22

Dimitri is solving the equation x^2 - 10x = 21. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial?

a. 0

b. 4

c. 25

d. 100

+1

Answers (1)

Know the Answer?

Monica Kaiser · Answer 1

We are given the expression x 2 - 10x = 21 where a number is to be added in both sides to complete the equation by completing the square. In this case, (-10/2) ^2 is equal to 25. The number that is added in the left side of the equation is equal then to 25.

Dimitri is solving the equation x^2 - 10x = 21. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial?a. 0b. 4c. 25d. 100

Dimitri is solving the equation x^2 - 10x = 21. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial?

a. 0

b. 4

c. 25

d. 100