Question

X^2-11x-42=0

-2X^2-5x-2=0

^-степень

Answer 1

1.
${x}^{2} - 11x - 42 = 0 \\ x \times x = - 42 \\ x + x = 11 \\ x = - 3 \: or \: x = 14$

2.

- 2x^2 - 5x - 2
d = 9
9 = 3
x = (5 + 3) ÷ - 4 = - 2
x = (5 - 3) ÷ - 4= - 0.5