Question

3х^2-2(х+5)=2х^2+14
помогите пож

Answer 1

3x² - 2(x + 5) = 2x² + 14
3x² - 2x - 10 = 2x² + 14
3x² - 2x - 10 - 2x² - 14 = 0
x² - 2x - 24 = 0
x = -(-2) ± √(-2)² - 4 • 1 (-24) / 2 • 1
x = 2 ± √4 + 96 / 2
x = 2 ± √100 / 2
x = 2 ± 10 / 2
x = 2 + 10 / 2
x = 2 - 10 / 2
x1 = -4
x2 = 6