x во второй степени+3x=4. Created by 10alex102016. matematika-ru

x во второй степени+3x=4...

10alex102016 @10alex102016

June 2022 2 38 Report

x во второй степени+3x=4

AnnaGeller505

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Квадратное уравнение

7 votes Thanks 4

fanta2310

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Х² + 3х = 4
х² + 3х - 4 = 0
D = b² - 4ac = 3² - 4·1·(-4) = 9 + 16 = 25
- 3 - √25 - 3 - 5
х₁ = ------------ = -------------- = - 8/2 = - 4
2 * 1 2
- 3 + √25 - 3 + 5
х₂ = ---------------= ----------- = 2/2 = 1
2 * 1 2

8 votes Thanks 6

Answers & Comments

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