(x+a) is the factor of the polynomial 2x+2ax+5x+10 find the value of a
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if (x+a) is the factor of polynomial it means that x= -a should satisfy the equation
f(x)=0
so
-2a-2a^2-10a+10=0
2a^2+12a-10=0
a^2+6a-5=0
a=(-6+√56)/2
f(x)=0
so
-2a-2a^2-10a+10=0
2a^2+12a-10=0
a^2+6a-5=0
a=(-6+√56)/2
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