7-1 Additional Practice Adding And Subtracting Polynomials Answer Key «Complete | Series»

The answer key for “7-1 Additional Practice: Adding and Subtracting Polynomials” sat face-down on Ms. Kellar’s desk, a silent judge.

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.” The answer key for “7-1 Additional Practice: Adding

Now, during the last five minutes of class, Ms. Kellar had stepped into the hall to take a call. The answer key was right there. One quick flip. A single glance. +1 extra credit for honesty

But then he remembered the day Ms. Kellar had handed back his last quiz. She hadn't just written a grade. She’d written: “Leo – you understand the idea . You just keep dropping the negative sign. Try stacking them vertically, like a tower.” The answer key was right there

He distributed the negative: 5y³ - 3y³ = 2y³. 0y² - 4y² = -4y². -2y - (-y) = -2y + y = -1y. 1 - (-6) = 7.