Rozwiąż równanie:2a - a^{2} + a(2 + a) = a + 18a^{2} + 5 = 5a(0,2a + 3)
1)
2a-a²+2a+a²= a+18
4a-a=18
3a=18 /:3
a=6
2)
a²+5 =a² +15a
15a=5 /:15
a=1/3
1.
2a - a^2 + a(2+a) = a+18
2a-a^2 +2a+a^2 = a+18
4a-a = 18
3a = 18 /:3
a = 6
2.
a^2 +5 = 5a(0,2a+3)
a^2 + 5 = a^2 + 15a
15a = 5 /:15
a = 5/15
a = 1/3
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1)
2a-a²+2a+a²= a+18
4a-a=18
3a=18 /:3
a=6
2)
a²+5 =a² +15a
15a=5 /:15
a=1/3
1.
2a - a^2 + a(2+a) = a+18
2a-a^2 +2a+a^2 = a+18
4a-a = 18
3a = 18 /:3
a = 6
2.
a^2 +5 = 5a(0,2a+3)
a^2 + 5 = a^2 + 15a
15a = 5 /:15
a = 5/15
a = 1/3