x2 + 9x - 90 x+9 Simplify and state restrictions: X 4x + 36 x - 6 x+9 4 (x - 9) x+ 15 O 4 (x + 9) x+ 15 O 4 O Restrictions: x * + Question 9 of 14 6x2 - 864 Simplify and state restrictions: 6x2 - 30x - 504 x + 12 x + 7 6x - 72 6x - 42 O x - 12 x - 7 12 O -5x + 7 Restrictions: x#