Question

Решить уровнение
x² - 7x + 12 = 0
2x² - 9x-18 = 0
64 - x² = 0

Answer 1

x² - 7x + 12 = 0
D=7²-12*4=49-48=1
х₁=(7+1)/2=4
х₂=(7-1)/2=3
2x² - 9x-18 = 0
D=9²+18*2*4=225
х₁=(9+15)/4=6
х₂=(9-15)/4=1,5
64 - x² = 0
х²=64
х₁=8
х₂=-8