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vitfil [10]
3 years ago
10

Sorry am dumb I need help pls hurry:/

Mathematics
2 answers:
anzhelika [568]3 years ago
7 0
Ok What question do you need help on
victus00 [196]3 years ago
6 0

Answer:

x = ±20

Step-by-step explanation:

Step 1: Write equation

x² = 400

Step 2: Square root both sides

x = ±√400

x = ±20

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

20² = 400

400 = 400

(-20)² = 400

400 = 400

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