2-20 even help

Please help me solve questions 2-20 all even so 2,4,6,8,10,12,14,16,18,20

SECTION 2.8 Exercises In Exercises 1-6. determine the x values that cause the polynomial 10. (2x - 7) (x2 - 4x + 4) > 0 function to be (a) zero, (b) positive, and (c) negative. 11. 2x3 - 3x2 - 1 1x + 620 1. f (x ) = (x + 2)(x+1)(x-5) 12. x3 - 4x2 + x+ 6 50 2. f (x) = (x - 7)(3x + 1)(x+ 4) In Exercises 13-20, solve the polynomial inequality graphically. 3. f (x) = (x+ 7)(x+ 4)(x - 6)2 13. x3 - x2 - 2x 20 4. f(x) = (5x + 3)(x2+ 6)(x - 1) 14. 2x3 - 5.x2+ 3.x 0 6. f ( x ) = (x + 2 ) 3 ( 4x2 + 1 ) ( x - 9 ) 4 16. x3 - 4x2 - x + 450 In Exercises 7-12, complete the factoring if needed, and solve the polynomial inequality using a sign chart. Support graphically. 17. 3.x3 - 2x2 - x + 620 7. (x + 1) (x - 3)2 >0 18. -x3 - 3x2-9x + 4