Question

2a+4=0 a=2,-2,1 please find the problem​

Answer 1

Answer:

$a=-2$

Step-by-step explanation:

$2a+4=0$

If $a=2$,

$2(2)+4=0\\4+4=0\\8\neq 0\\LHS\neq RHS$

If $a=-2$

$2(-2)+4=0\\-4+4=0\\0=0\\LHS=RHS$

If $a=1$

$2(1)+4=0\\2+4=0\\6\neq 0\\LHS\neq RHS$

∴ $a=-2$