If 
write the value of x.
Simply by equating both sides we can get the value of x.
2x2+2x-2(x2+4x+3)=-12
⇒ -6x-6=-12
⇒ -6x=-6
⇒ 
1
If write the value of x.
Simply by equating both sides we can get the value of x.
2x2+2x-2(x2+4x+3)=-12
⇒ -6x-6=-12
⇒ -6x=-6
⇒