Question

×2+4×-45=0
16×2-24×+8=0
25×2-100=0

Answer 1

x² + 4x - 45 = 0

x           + 9

x            - 5

9x - 5x = 4x

(x+9)(x-5) = 0

x + 9 = 0       x - 5 = 0

x = -9            x = 5

CS = (-9; 5)

16x² - 24x + 8 = 0  divido entre 8

2x² - 3x  + 1 = 0

2x             - 1

 x             - 1

- 2x - x = - 3x

(2x - 1)(x - 1) = 0

2x - 1 = 0              x - 1 = 0

2x = 1                   x = 1

 x = 1/2            

CS = (1/2 ; 1)

Eternamente axllxa