Answer:
x = ±10
Step-by-step explanation:
4x² - 400 = 0
Add 400 to both sides
4x² = 400
Divide both sides by 4
x² = 100
Take the square root of both sides
x = ±10
#3 is even I really hope this works
Answer:
3:1
Step-by-step explanation:
Take the fraction and simplify it:
12/4 = 3/1
Is would be a I think because if you times those to numbers you get 20
Answer:
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Step-by-step explanation:
