[Will give brainliest if answer correctly]
I need help with this question.

The expression n2 + n represents the total number of blocks used in the nth figure of a pattern.

Figure 1 has 2 units. FIgure 2 has 6 units. Figure 3 has 12 units.

Use the equation n2 + n = 56 to determine which figure has 56 blocks.

Figure _

has 56 blocks.