What are the solutions of 3x2 + 15 = –6x?
–1 ± i
–1 ± 2i
–2 ± i
–2 ± 2i
which of the following is a factor of 9x2 + 21x + 10?
3x + 5
9x + 2
9x + 5
none of the above

Ques 1:

Ques 2:

Step-by-step explanation:

The quadratic formula states that the roots of the equation, are given by, .

Ques 1: The quadratic equation is given by, .

On comparing, a= 3, b= 6 and c= 15.

So, the roots of the equation are given by,

i.e.

i.e.

i.e.

i.e. and i.e.

i.e. and i.e.

Thus, the solutions of the equation are .

Ques 2: The quadratic equation is .

On comparing, a= 9, b= 21 and c= 10.

So, the roots of the equation are given by,

i.e.

i.e.

i.e.

i.e. and i.e.

i.e. and i.e.

i.e. and i.e.

That is, the factors are and

So, according to the options, is the correct option.

hi im bob : l

step-by-step explanation: