Question

Which polynomial does the model represent?

A black square, two white rods, three black rods, three white unit blocks and one black unit block are shown.

A. –x³ + 2x² – 3x + 2
B. x² + x – 2
C. –x² – x + 2
D. –x² + x – 2

Answer 1

The answer is C -x^2-x+2

Answer 2

Explanation:

Assume black represents negative and white positive, square is x^2, rod is x and block is number:

-x^2 +2x -3x +3 -1

= -x^2 -x + 2

The answer is C.