Answer: [tex](x+5)(x-3)[/tex]
Step-by-step explanation:
Given
The quadratic equation is [tex]x^2+?x-15[/tex]
The coefficient of x is not given
value of x can be [tex]2[/tex]
for 2, it is
[tex]\Rightarrow x^2+2x-15\\\Rightarrow x^2+5x-3x-15\\\Rightarrow (x+5)(x-3)[/tex]