Solution:
From the given option (a)
Put x = - 3 in the given equation
x³+ 5x²-2x-24
(-3)³+ 5(-3) ² - 2×(-3)-24=0
-27+45+6-24=0
-51+51=0
0=0 satisfied
Again, x = -4
x³+ 5x²-2x-24
(-4) ³+5(-4)² 2×-4)-24=0
-64+80+8-24=0
-88+88=0
satisfied.
Therefore, the correct option is (a)
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