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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?

0
4
25
100

User Meeme
by
4.9k points

2 Answers

2 votes

Answer:

C. 25

Explanation:

User Stickfigure
by
6.0k points
3 votes

Answer:

it's 25, just did it

Explanation:

1 /2 o f ( − 10 ) = − 5 , ( − 5 )^ 2 = 25

User Steven Black
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6.3k points