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космэля
@космэля
July 2022
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1)2х^2+3х+4=0 2)9х^2-6х+1=0
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alexooooon
Verified answer
2x^2 + 3x + 4 = 0;
D = b^2 - 4ac;
D = 3^2 - 4 * 2 * 4;
D = 9 - 32 = -23;
D < 0, корней нет!
Ответ: x ∈ Ø.
9x^2 - 6x + 1 = 0;
D = b^2 - 4ac;
D = -6^2 - 4 * 9 * 1;
D = 36 - 36 = 0;
D = 0, один корень!
x = -b/2a;
x = 6/(2*9);
x = 6/18; |:6
x = 1/3;
Ответ: 1/3.
2 votes
Thanks 4
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Answers & Comments
Verified answer
2x^2 + 3x + 4 = 0;D = b^2 - 4ac;
D = 3^2 - 4 * 2 * 4;
D = 9 - 32 = -23;
D < 0, корней нет!
Ответ: x ∈ Ø.
9x^2 - 6x + 1 = 0;
D = b^2 - 4ac;
D = -6^2 - 4 * 9 * 1;
D = 36 - 36 = 0;
D = 0, один корень!
x = -b/2a;
x = 6/(2*9);
x = 6/18; |:6
x = 1/3;
Ответ: 1/3.