The partial factorization of x2 – 3x – 10 is modeled with algebra tiles. An algebra tile configuration. 1 tile is in the Factor 1 spot: and is labeled x. 6 tiles are in the Factor 2 spot: 1 is labeled x and 5 are labeled negative. 18 tiles are in the Product spot: 1 is labeled x squared, 2 are labeled x, the 5 tiles below x squared are labeled negative x, and the 10 tiles below the x tiles are labeled negative. Which unit tiles are needed to complete the factorization? 2 negative unit tiles 2 positive unit tiles 5 negative unit tiles 5 positive unit tiles.