Which of the following is a solution of x2 + 4x = −8? x=-2-2ix=2+2ix=-4+4ix=4-4i

x=-2-2i

Step-by-step explanation:

There are 4 ways to solve quadratic equations. These are factorization, completing the square, formula and graphical methods.

Using the formula method, considering a quadratic equation

ax^2 + bx + c = 0,

x = (-b±√(b² - 4ac))/2a

Given x2 + 4x = −8

= x2 + 4x + 8 = 0

a = 1, b = 4 ,c = 8

x = (-4±√(4² - 4×1×8))/2×1

x = -4±√-16/2

x = -4±4i/2

x = -2±2i

x = -2-2i, x = -2+2i

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

i need points

step-by-step explanation: