Question

decide whether x=2 ia a solution of x² + 4x -12

Answer 1

Attachment......⛄⛄⛄⛄⛄

Answer 2

putting x=-2
${x}^{2} + 4x - 12 \\ = { - 2}^{2} + 4 \times ( - 2) - 12 \\ = 4 - 8 - 12 \\ = 4 - 20 \\ = - 16$
since -16!= 0
hence x=2 is not a factor of the given equation