2x+3y=16 x=(16-3y)/2 x= (16-3y)/2 x=(16-3y)/2
{ { { {
3x-2y=11 3x-2y=11 (48-9y)/(2) - 2y=11 (48-9y-4y)/(2)=11
x=(16-3y)/2 x=(16-3y)/2 x=(16-3y)/2 x=(16-6)/2 x=10/2 x=5
{ { { { { {
(48-13y)/2=11 48-13y=22 26=13y y=2 y=2 y=2.
x+7-2x(x²-25)+2/x²-25
x+7-2x³+50x+2/x²-25
-2x³+51x+9/x²-25
-2*(-5.1)³+51*(-5.1)+9/(-5.1)²-25
-2*(-5.1)³-206,1+9/(-51/10)²-25
2*(51/10)³-2601/10+9/51²/100-25
2*51³/10³-2601/10+9/51²-2500/100
2*51³/5³*2³-2601/10+900/51²-2500
51³/5³*2²-2601/10+900/2601-2500
51³/125*4-2601/10+900/101
51³/500-2601/10+900/101
51³/500-253701/1010
≈14.11