Proszę o jak najszybsze rozwiązanie:
2a - a do potęgi 2 + a ( 2 + a ) = a + 18
2a - a2 +a(2 +a) =a +18
2a -a2 +2a +a2 =a +18
4a -a =18
3a =18 /:3
a = 6
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2a - a2 +a(2 +a) =a +18
2a -a2 +2a +a2 =a +18
4a -a =18
3a =18 /:3
a = 6
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