Question

X(4) - 7x(2) - 18 = 0

Answer 1

Объяснение:

х⁴-7х²-18=0

х⁴-7х²=18

(x+3)(x−3)(x2+2)=0

Если любой отдельный множитель в левой части уравнения равен нулю, то и все выражение будет равняться 0.

x+3=0

х=-3

Answer 2

To solve the quadratic equation x^2 - 7x - 18 = 0, you can use the quadratic formula. The quadratic formula states that for an equation of the form ax^2 + bx + c = 0, the solutions for x are given by:

x = (-b ± √(b^2 - 4ac)) / (2a)

In this case, a = 1, b = -7, and c = -18. Substituting these values into the quadratic formula, we get:

x = (-(-7) ± √((-7)^2 - 4(1)(-18))) / (2(1))

Simplifying further:

x = (7 ± √(49 + 72)) / 2

x = (7 ± √121) / 2

x = (7 ± 11) / 2

Therefore, the solutions to the equation x^2 - 7x - 18 = 0 are:

x1 = (7 + 11) / 2 = 9 x2 = (7 - 11) / 2 = -2