Pls help! ☆☆10 points☆☆ I'm really confused it is NOT a multiple choice question

The set of complex numbers is the set of all numbers of the form a I bi, where a and b are real numbers. In a * bi, a is called the real part and b is called the imaginary part. Two complex numbers a * bi and c f di are equal if and only if their real parts are equal (a : c) and their imaginary parts are equal (b : d).In a * bi, a is called the real part and b is called the imaginary part. Two

complex numbers a * bi and c f di are equal if and only if their real parts are

equal (a : c) and their imaginary parts are equal (b : d).If b : 0, then a * bi is

a real number.If b * 0, then a * bi is an imaginary number.

The form a * bi is the standard form of a complex numbeg but for convenience we use a few variations of that form. If either the real or imaginary part of a

complex number is 0, then that part is omitted

Step-by-step explanation:If a * bi and c * di are complex numbers, we define their sum, difference,

and product as follows.

(a + bi) + (c + di) : (a.| c) * (b + Ai

(a + bi) * (c + di): (a - c) + (b * d)i

(a + bi)(c + di) : (ac - bd) + (bc + afii

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15