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McKs228
@McKs228
March 2022
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гюйс
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1.
a) 30a²+11ab=a(30a+11b)
б) 17m^5 - 5m²=m²(17m³ - 5)
в) ....=6x²y(2y³ - 3xy² - 1)
2.
a) .....=(4c+7c)(a-c)=11c(a-c)
в ......=z(x+y)+5(x+y)=(z+5)(x+y)
3.
a) .....=5(a² -9b²)=5(a-3b)(a+3b)
б) .....=4m² - 24mn+36n²=4(m² - 6mn+9n²)=4(m-3n)(m-3n)=4(m-3n)²
в) .....=(x-5y³)(x²+5xy³+25y^9)
4.
x³+5x² - 25x - 125=0
(x - 5)(x²+10x+25)=0
(x-5)(x+5)(x+5)=0
x-5=0
x1=5
x+5=0
x2=x3= - 5
x=+-5
5.
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Answers & Comments
Verified answer
1.a) 30a²+11ab=a(30a+11b)
б) 17m^5 - 5m²=m²(17m³ - 5)
в) ....=6x²y(2y³ - 3xy² - 1)
2.
a) .....=(4c+7c)(a-c)=11c(a-c)
в ......=z(x+y)+5(x+y)=(z+5)(x+y)
3.
a) .....=5(a² -9b²)=5(a-3b)(a+3b)
б) .....=4m² - 24mn+36n²=4(m² - 6mn+9n²)=4(m-3n)(m-3n)=4(m-3n)²
в) .....=(x-5y³)(x²+5xy³+25y^9)
4.
x³+5x² - 25x - 125=0
(x - 5)(x²+10x+25)=0
(x-5)(x+5)(x+5)=0
x-5=0
x1=5
x+5=0
x2=x3= - 5
x=+-5
5.