Question

deside whether (x+2) is factor of polynomial x squre -3x-10.

Answer 1

x+2=0
x=-2
substituting value of x in -3x-10.
-3(-2)-10=6-10
=-4
therefore (x+2) is not a factor

Answer 2

$\huge{HEY\:BUDYYY}$

==> To decide whether,,, x+2 is a factor of the given expression,, use remainder theorem...

...

since given,,,
x+ 2

=> x = -2

hence substitute in the prime equation......

-3(-2) -10 = 0

+6 - 10 =0
-4 =/= 0...

hence it is not a factor of the expression...
..

$\bold{RGRDSM@STYLG..}$