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2y = 30+x . y > x
x²=30+x
x²-x-30=0
x²+5x-6x-30=0
x(x+5)-6(x+5) = 0
(x+5)(x-6)=0
x+5=0 v x-6=0
x=-5∉D v x=6
2y=30+6
2y=36
y=18
Odp. x=6, y=18.
2y=30+x
dlax=-5
2y=30-5
2y=25
y=12,5
2;-5;12,5-cg geom.
-5;12,5;30-cg aryt.
2y=30+x
dla x=6
2y=30+6
y=18
2,6,18-cg. geom
6,18,30-cg. geom