Сократите дробь 5a^2+19a-4 ------------------- 1-25a^2 2

Question

Сократите дробь 5a^2+19a-4
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1-25a^2 2

Answer 1

5a^2+19a-4=0
D=19^2 + 4×5×4 = 361 + 80 = 441 = 21
a1=-19+21/2×5 =- 0,2
a2=-19-11/2×5 = 30/10= 3
1-25×0,04×2=-1
1-25×9×2=-449