Expand 2 (5x+4) (5x+4)

If you would like to expand 2 * (5 * x + 4) * (5 * x + 4), you can calculate this using the following steps:

2 * (5 * x + 4) * (5 * x + 4) = (10 * x + 8) * (5 * x + 4) = 10 * x * 5 * x + 10 * x * 4 + 8 * 5 * x + 8 * 4 = 50 * x^2 + 40 * x + 40 * x + 32 = 50 * x^2 + 80 * x + 32

The correct result would be 50 * x^2 + 80 * x + 32.

2 (5x+4) (5x+4) = 2 (25x^2 + 20x + 20x + 16) = 2 (25x^2 + 40x + 16) = 50x^2 + 80x + 32.