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Blizzard [7]
4 years ago
12

I really need help with this

Mathematics
1 answer:
stealth61 [152]4 years ago
7 0

Answer:

100

Step-by-step explanation:

To complete the square, you have to add (\frac{b}{2})² to each side.

So, -20 divided by 2 is -10. -10 squared is 100, so add 100 to both sides of the equation to complete the square.

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