Question

Решительно пожалуйста) срочно -x²=5x-36 ((2x-10)/(x+5)-4=0 ((3x+4)/5)-((x²+4x-3)/3)=1

Answer 1

4) x² + 5x - 36 = 0
D = 25 + 144 = 169
x1 = (-5 - 13)/2 = -9
x2 = (-5 + 13)/2 = 4

5) x≠-5
2x²-10-4x-20 = 0
2x² - 4x - 30 = 0
x² - 2x - 15 = 0
D = 4 + 60 = 64
x1 = (2-8)/2 = -3
x2 = (2+8)/2 = 5

6) 9x + 12 - 5x²- 20x + 15 = 15
5x² + 11x - 12 = 0
D = 121 + 240 = 361
x1 = (-11 - 19)/10 = -3
x2 = (-11 + 19)/10 = 0,8