Question

4х²-5х-6=0
ответ срочно!!​

Answer 1

$4 {x}^{2} - 5x - 6 = 0 \\ D = {b}^{2} - 4ac = ( - 5 {)}^{2} - 4 \times 4 \times( - 6) = 121 \\ x_{1} = \frac{ - b - \sqrt{D} }{2a} = \frac{5 - \sqrt{121} }{2 \times 4} = \frac{ - 6}{8} = - 0.75 \\ x_{2} = \frac{ - b + \sqrt{D} }{2a} = \frac{5 + \sqrt{121} }{2 \times 4} = \frac{16}{8} = 2$

Answer 2

Ответ:

x1= -0,75

x2= 2

Объяснение:

4х²+3х-8х-6=0

х×(4х+3)-2(4х+3)=0

(4х+3)×(х-2)=0

4х+3=0

х-2=0

х= -3/4

х=2

или

х= -0,75

х= 2