Solve 3x^2=-12x-15
x=-4+2i
x=-4+i
x=-2+2i
x=-2+i

x = -2 + i or x = -2 - i

Step-by-step explanation:

Solve for x:

3 x^2 = -12 x - 15

Add 12 x + 15 to both sides:

3 x^2 + 12 x + 15 = 0

Divide both sides by 3:

x^2 + 4 x + 5 = 0

Subtract 5 from both sides:

x^2 + 4 x = -5

Add 4 to both sides:

x^2 + 4 x + 4 = -1

Write the left hand side as a square:

(x + 2)^2 = -1

Take the square root of both sides:

x + 2 = i or x + 2 = -i

Subtract 2 from both sides:

x = -2 + i or x + 2 = -i

Subtract 2 from both sides:

x = -2 + i or x = -2 - i

answer: ok

step-by-step explanation:

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.