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28-09-2020
Mathematics

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Sorry am dumb I need help pls hurry:/

Sorry am dumb I need help pls hurry class=

Respuesta :

28-09-2020

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

Plug in x to verify it's a solution.

20² = 400

400 = 400

(-20)² = 400

400 = 400

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28-09-2020

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