Which is greater than 4? (a) 5, Which is the smallest? (a) -1, Combine terms: 12a + 26b -4b ā 16a. (a) 4a + 22b, Simplify: (4 ā 5) ā (13 ā 18 + 2). (a) -1, What is |-26|? (a) -26, Multiply: (x ā 4)(x + 5) (a) x2 + 5x - 20, Factor: 5x2 ā 15x ā 20. (a) 5(x-4)(x+1), Factor: 3y(x ā 3) -2(x ā 3).