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SuperMiha1
@SuperMiha1
August 2021
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3 вариант поооомогииите
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m11m
Verified answer
1.
a) x²(1+3x²)
б) 3(a²-9)=3(a-3)(a+3)
в) x²+4x+4=(x+2)²
2.
x(x-3)=0
x=0 x-3=0
x=3
Ответ: 0; 3.
3.
(3c⁶)/a²
4.
2ab-(a+b)²+2a²=2ab-a²-2ab-b²+2a²=a²-b²=(a-b)(a+b)
Что и требовалось доказать.
5.
(x³+3x²)-(9x+27)=0
x²(x+3)-9(x+3)=0
(x+3)(x²-9)=0
(x+3)(x-3)(x+3)=0
x+3=0 x-3=0
x= -3 x=3
Ответ: -3; 3.
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Answers & Comments
Verified answer
1.a) x²(1+3x²)
б) 3(a²-9)=3(a-3)(a+3)
в) x²+4x+4=(x+2)²
2.
x(x-3)=0
x=0 x-3=0
x=3
Ответ: 0; 3.
3.
(3c⁶)/a²
4.
2ab-(a+b)²+2a²=2ab-a²-2ab-b²+2a²=a²-b²=(a-b)(a+b)
Что и требовалось доказать.
5.
(x³+3x²)-(9x+27)=0
x²(x+3)-9(x+3)=0
(x+3)(x²-9)=0
(x+3)(x-3)(x+3)=0
x+3=0 x-3=0
x= -3 x=3
Ответ: -3; 3.