1 целая 5/7 : 2 : 1/2 = 1 целая 5/7 * 1/2 * 2 = 1 целая 5/7
1.
А)
(3 1/4)^9 * (4/13)^11=(13/4)^9 * (4/13)^11= 1^9+11 = 1^20 = 1
Б)
2^9 * 5^14 : 50^7 = 2^9 * 5^14 : 2^7 * 5^14 = 2^2 = 4
2.
((x^4)^32 : x^43 / (x^5)^17) * x=201
(x^128 : x^43 / x^85) * x =201
(x^85/x^85) * x = 201
x = 201, при x не равном 0.
27a^2 - 18ab=3a*9a-2b*9a=9a(3a-2b)
X-y=1
x+y=-5 /+
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x-y+x+y=1+(-5)
2x=-4
x=-2
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y=-5-x, y=-5-(-2)=-5+2=-3
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/x,y/=/-2,-3/
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А^2-4+а^2+8а-16=2а^2+8а-20