(6+x)²=(x-2)(3-x)
36+x²=3x-6-x²+2x
x²+x²-5x+36+6=0
2x²-5x+42=0
x(8-3x)=(5x-1)²
8x-3x²=25x²-10x+1
25x²+3x²-10x-8x+1=0
28x²-18x+1=0
<span>0,1327;<span>0,13</span><span>; 0,014;</span></span>
х + у = 75 х+у = 75 5у/2 = 75 у = 30
х = 3(х-у) 2х = 3у х = 3у/2 х = 45
Ответ: 30; 45.
{х=2у-4; -3*(2у-4)+у=2; { х=2у-4; -6у+12+у=2; { х=2у-4; -5у=-10; { х=2у-4; у=2; { х=2*2-4=0 у=2