[ ( 3X - 2K ) / ( 5K + 2X ) ] - 3 = ( 3X - 2K - 3 * ( 5K + 2X )) / ( 5K + 2X ) =
= ( 3X - 2K - 15K - 6X ) / ( 5K + 2X ) = ( - 17K - 3X ) / ( 5K + 2X )
Ответ 2) ( - 17K - 3X ) / ( 5K + 2X )
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[ ( P - Q ) / ( P^3 * Q^2 ) ] - [ ( P + Q ) / ( P^2 * Q^3 ) =
= [ Q * ( P - Q ) - P * ( P + Q ) ] / ( P^3 * Q^3 ) =
= ( PQ - Q^2 - P^2- PQ ) / ( P^3 * Q^3 ) =
= ( - Q^2 - P^2 ) / ( P^3 * Q^3 )
ОТВЕТ 5) - ( Q^2 + P^2 ) / ( P^3 * Q^3 )
S=1/2*x*y
x^2+y^2=17^2
1/2*x*y=60
x^2+y^2=289
2x+4-x+1=9
x=9-4-1
x=4
x+7-7x+9=28
-6x=28-9-7
-6x=12
x=-2