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dota2bog1
@dota2bog1
September 2021
2
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15^3/5^2*3^4
решите пожалуйста
2) разложите на множители
2ab-a^2+4-b^2
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shevtsovavalia
15³ / (5² *3⁴) = (5 *3)³ /(5² *3⁴) = (5³ *3³) / (5² * 3 ⁴) =
= 5³⁻² * 3³⁻⁴ = 5¹ * 3⁻¹ = 5 * 1/3 = 1 2/3
2ab - a² +4 - b² = - [(a² -2ab +b²) - 4] = - [ (a-b)² - 2² ]=
= - (a-b-2)(a-b+2) = (-a+b+2)(a-b+2)
1 votes
Thanks 1
zhenyaM2002
Verified answer
2)2ab-a²+4-b²=-((a²-2ab+b²)-4)=-((a-b)²-4)=-(a-b-2)(a-b+2)
1)15³/(5²*3⁴)=(5³*3³)/(5²*3⁴)=5/3=1 2/3
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Answers & Comments
= 5³⁻² * 3³⁻⁴ = 5¹ * 3⁻¹ = 5 * 1/3 = 1 2/3
2ab - a² +4 - b² = - [(a² -2ab +b²) - 4] = - [ (a-b)² - 2² ]=
= - (a-b-2)(a-b+2) = (-a+b+2)(a-b+2)
Verified answer
2)2ab-a²+4-b²=-((a²-2ab+b²)-4)=-((a-b)²-4)=-(a-b-2)(a-b+2)1)15³/(5²*3⁴)=(5³*3³)/(5²*3⁴)=5/3=1 2/3