Question

9x=-2x во второй степени-10
решите пж

Answer 1

9x=-2x²-10

2x²+9x+10=0

(x+2)(2x+5)=0

x = -2 или x = -2,5

Answer 2

$9x = - 2 {x}^{2} - 10 \\ 2 {x}^{2} + 9x + 10 = 0 \\ d = 81 - 4 \times 2 \times 10 = \\ 81 - 80 = 1 \\ x1 = \frac{ - 9 - 1}{2 \times 2} = - 2.5 \\ x2 = \frac{ - 9 + 1}{2 \times 2} = - 2$