Question

X^+7x-18=0 Помогите плз

Answer 1

D=49-4* (-18)=121
x 1 = -7 +11  :2 = 2
 х 2 = -7-11 :2 =-9

Answer 2

Solving the Equation x^2 + 7x - 18 = 0

To solve the equation x^2 + 7x - 18 = 0, we can use the quadratic formula, which 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)

Using this formula, we can find the solutions for the given equation.

The solutions for the equation x^2 + 7x - 18 = 0 are: x = -9 and x = 2.

This can be verified using the quadratic formula: x = (-7 ± √(7^2 - 4*1*(-18))) / (2*1) x = (-7 ± √(49 + 72)) / 2 x = (-7 ± √121) / 2 x = (-7 ± 11) / 2 x = 4 / 2 = 2 or x = -18 / 2 = -9.

Therefore, the solutions to the equation x^2 + 7x - 18 = 0 are x = -9 and x = 2.