He distributed the negative: 5y³ - 3y³ = 2y³. 0y² - 4y² = -4y². -2y - (-y) = -2y + y = -1y. 1 - (-6) = 7.
The subtraction was the worst. His friend Mia had whispered, “Just distribute the minus sign, Leo. Like a negative love letter.” But Leo kept forgetting to flip the last sign. He distributed the negative: 5y³ - 3y³ = 2y³
To Leo, it wasn’t a sheet of paper. It was the wall between a C- and a B+. He’d spent forty-five minutes wrestling with problems like “Add: (3x² + 2x - 5) + (x² - 4x + 7)” and the soul-crushing “Subtract: (5y³ - 2y + 1) - (3y³ + 4y² - y - 6).” 1 - (-6) = 7
The answer key would give him the what . But it wouldn't fix the why . Like a negative love letter
At the top, in blue ink, she had written: “You found the tower. +1 extra credit for honesty. I saw you look at the key and choose not to flip it.”
Leo smiled. The real answer key wasn’t on a separate sheet of paper. It was in the careful, error-by-error process of building his own.
Slowly, deliberately, Leo turned the page of his own notebook. He crossed out his first attempt on problem #7. He rewrote the subtraction vertically, aligning the like terms: