Which of the following is a solution of x2 + 4x = -15? (2 points)
Select one:
a.
b.
c.
d.

Question

Which of the following is a solution of x2 + 4x = -15? (2 points)
Select one:
a.
b.
c.
d.

anonymous · Answer

where are the choices?

anonymous · Answer

if you want to solve it, move the -15 to the other side by adding, and factor out the problem

anonymous · Answer

the choices are 
A.x=-2-sqroot(19)
B.x=2+sqroot(19)
C.x=2+imaginary number sqroot(11)
D.x=-2-imaginary number sqroot(11)

anonymous · Answer

$$x^{2}+4x+15 $$ use the quadratic formula to solve for this

anonymous · Answer

do you know what the  quadratic formula looks like?

anonymous · Answer

I cant remember off the top of my head

anonymous · Answer

$$\frac{ -b+-\sqrt{b ^{2}*4ac} }{2a  }$$

anonymous · Answer

$$ax^2+bx+c$$

anonymous · Answer

in this case the a is 1, the b is 4 and the c is 15 
so plug the numbers into the formula, and solve

anonymous · Answer

ok thanks

anonymous · Answer

you're welcome

imtiaz7 · Answer

it cannot be solved by factorization and it is solved by quadratic formula because middle term (4x) donot break.
By quadratic formula:
as shown above (helpme.12)'s comment:
where a=1, b=4 and c=15