Answer
Impossible to factor
Work Step by Step
$x^{2}+4x-10$ is impossible to factorize because we need two number whose product is -10 and sum +4 but
1,-10 -> -9 ( incorrect sum)
2,5 -> 7 (incorrect sum)
-1,+10-> 9 (incorrect sum)
-2,-5 -> -7 (incorrect sum)
there is no correct sum so it is impossible to factor