Ответ:
√56 = √(4 * 14) = 2 √14
3/5 √450 = 3/5 √(9 * 50) = 3/5 * 3 √50 = 9/5 √50
-1/7 * √147 = -1/7 * √(21 * 7) = -1/7 * √(3*7*7) = -1/7 * 7 * √3 = -√3
5 * √6 = √(25 * 6) = √150
5 * √(x/5) = √5*5*(x/5) = √(5x)
-2 * √13x = - √2*2 * 13x = -√(72x)
√2 * (√8 + 4*√2) = √(2 * 8) + 4 * 2 = √16 + 8 = 4 + 8 = 12
√242 - √200 + √8 = √(121 * 2) - √(100 * 2) + √(4*2)=11√2 - 10√2+2√2=3√2
(√7 - 2√3)(√7 + 2√3) = (по формуле (a-b)(a+b)=a²-b²) = 7 - 4*3 = 7 - 12 = -5
(√3 + 6)² = 3 + 2*6*√3 + 36 = 39 + 12√3
Объяснение:
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Ответ:
√56 = √(4 * 14) = 2 √14
3/5 √450 = 3/5 √(9 * 50) = 3/5 * 3 √50 = 9/5 √50
-1/7 * √147 = -1/7 * √(21 * 7) = -1/7 * √(3*7*7) = -1/7 * 7 * √3 = -√3
5 * √6 = √(25 * 6) = √150
5 * √(x/5) = √5*5*(x/5) = √(5x)
-2 * √13x = - √2*2 * 13x = -√(72x)
√2 * (√8 + 4*√2) = √(2 * 8) + 4 * 2 = √16 + 8 = 4 + 8 = 12
√242 - √200 + √8 = √(121 * 2) - √(100 * 2) + √(4*2)=11√2 - 10√2+2√2=3√2
(√7 - 2√3)(√7 + 2√3) = (по формуле (a-b)(a+b)=a²-b²) = 7 - 4*3 = 7 - 12 = -5
(√3 + 6)² = 3 + 2*6*√3 + 36 = 39 + 12√3
Объяснение: