The partial factorization of x2 – 3x – 10 is modeled with algebra tiles. 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
Accepted Solution
A:
x² - 3x - 10
x² = x * x 10 can be factored: 1 x 10 ⇒⇒⇒ difference between factors = 9 2 x 5 ⇒⇒⇒ difference between factors = 3 ⇒ (The correct pair)