\

\

$\"\"$

\

The equation is $\"\"$

\

$\"\"$ (Substitute d=-4)

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Absolute value of $\"\"$ )

\

$\"\"$ \ \

\

Compare the values, the equation is false.

\

$\"\"$

\

The given number is not a solution to the equation.

\

\

\