Question

How to Factor -x^2-2x +15

Answer 1

Answer:

(x-3)(x+5)

Step-by-step explanation:

this is a quadratic equation

delta = b^2 - 4ac = > 0 so there are 2 roots

then do $x = \frac{2 + \sqrt{64} }{-2} = -5\\x = \frac{2 - \sqrt{64} }{-2} = 3$

Answer 2

Answer:

Step-by-step explanation:

-2x2-12x-15

Final result :

 -2x2 - 12x - 15

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 ((0 -  2x2) -  12x) -  15

Step  2  :

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  -2x2 - 12x - 15  =   -1 • (2x2 + 12x + 15)

Trying to factor by splitting the middle term

3.2     Factoring  2x2 + 12x + 15