Question

Find if (-2x-5) is a factor of the polynomial p(x)=3x^4 + 5x^3 -2x^2 -4​

Answer 1

Step-by-step explanation:

-2x-5=0

-2x=0+5

-2x=5

x=5/-2

3x^4 + 5x³ - 2x² -4

3 (5/-2)^4 + 5 (5/-2)³ - 2 (5/-2)² -4

3 ( 625/16)+5(125/-8) - 2 (25/4)-4

117.1875 + (−78.125) - 12.5 -4

117.1875-78.125-12.5-4

22.5625