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ionina23
@ionina23
July 2022
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маслёнок95
A)2√2/√2√2=2√2/2=√2
б)6√3/√3√3=6√3/3=2√3
в)√(x-y)/√(x-y)√(x-y)= √(x-y)/(x-y)
г)(а+b)√(a+b)/√(a+b)√(a+b)=(a+b)√(a+b)/(a+b)= √(a+b)
д)(х+3)√(х²-9)/√(х²-9)√(х²-9)=(х+3)√(х²-9)/(х²-9)=(х+3)√(х²-9)/(х+3)(х-3)= √(х²-9)/(х-3)
е)(а-b)√(a²-b²)/√(a²-b²)√(a²-b²)=(a-b)√(a²-b²)/(a²-b²)=(a-b)√(a²-b²)/(a-b)(a+b)= √(a²-b²)/(a+b)
ж)(1-√2)/(1+√2)(1-√2)= (1-√2)/(1-2)=- (1-√2)=√2-1
з) (1+√2)/(1+√2)(1-√2)= (1+√2)/(1-2)= -(1+√2)=-1-√2
и)√3(√3+5)/(√3+5)(√3-5)=√3(√3+5)/(3-25)= √3(√3+5)/(-22)=-√3(√3+5)/22
к)а(√а+а)/(√а-а)(√а+а)=а(√а+а)/(а-а²)
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Answers & Comments
б)6√3/√3√3=6√3/3=2√3
в)√(x-y)/√(x-y)√(x-y)= √(x-y)/(x-y)
г)(а+b)√(a+b)/√(a+b)√(a+b)=(a+b)√(a+b)/(a+b)= √(a+b)
д)(х+3)√(х²-9)/√(х²-9)√(х²-9)=(х+3)√(х²-9)/(х²-9)=(х+3)√(х²-9)/(х+3)(х-3)= √(х²-9)/(х-3)
е)(а-b)√(a²-b²)/√(a²-b²)√(a²-b²)=(a-b)√(a²-b²)/(a²-b²)=(a-b)√(a²-b²)/(a-b)(a+b)= √(a²-b²)/(a+b)
ж)(1-√2)/(1+√2)(1-√2)= (1-√2)/(1-2)=- (1-√2)=√2-1
з) (1+√2)/(1+√2)(1-√2)= (1+√2)/(1-2)= -(1+√2)=-1-√2
и)√3(√3+5)/(√3+5)(√3-5)=√3(√3+5)/(3-25)= √3(√3+5)/(-22)=-√3(√3+5)/22
к)а(√а+а)/(√а-а)(√а+а)=а(√а+а)/(а-а²)