Question

Plz answer fast
.......

Answer 1

x+2=0
or, x=-2
therefore a(-2)^3+3×(-2)^2-13
= -8a+3×4-13
=-8a+12-13
=-8a-1
and
2(-2)^3-5(-2)+a
=2×(-8)+10+a
=-16+10+a
=-6+a

therefore -8a-1=-6+a
or, -8a-a= -6+1
or, -9a= -5
or a= 5/9