Answer: x² + 15x + 50
Explanation:
Since all the options is a quadratic = 0, then let's write the given equation in that form by making 0 the subject of the equation:
−x² = 15x+50 [add x² to both sides]
-x² + x² = x² + 15x + 50 [simplify]
x² + 15x + 50 = 0 (OPTION D)