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луизабагдела
@луизабагдела
August 2022
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Помогите,пожалуйста, 4 и 8
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yellok
4. -4/5x²+45=0
4/5x²=45
x²=45*5/4=56.25
x=√56.25
x=7.5
8. 22-x>5-4(x-2)
22-x>5-4x+8
22-13>-4x+x
9>-3x
-9<3x
x>-3 ⇒x∈(-3,+∞)
ответ 4)
2 votes
Thanks 1
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Answers & Comments
4/5x²=45
x²=45*5/4=56.25
x=√56.25
x=7.5
8. 22-x>5-4(x-2)
22-x>5-4x+8
22-13>-4x+x
9>-3x
-9<3x
x>-3 ⇒x∈(-3,+∞)
ответ 4)