verify if 1 and minus 3 hours use of the polynomial 3 x cube + 5 x squ

1.	verify if 1 and minus 3 hours use of the polynomial 3 x cube + 5 x square - 11 X + 3 then factorise the polynomial
Answer» Step-by-step EXPLANATION: $3 {x}^{3} + 5 {x}^{2} - 11x + 3$ is the polynomial Substitute x=>1 in this polynomial => $3 {(1)}^{3} + 5 {(1)}^{2} - 11(1) + 3 = 3 + 5 -$ $11 + 3 = 0$ So 1 is the root of this polynomial. Substitute x=>-3 in this polynomial => $3 {( - 3)}^{3} + 5 {( - 3)}^{2} - 11( - 3) + 3 = >$ $3( - 27) + 5(9) - 11( - 3) + 3 = - 81$ $+ 45 + 33 + 3 = - 81 + 81 = 0$ HENCE -3 is also the root of polynomial Hence proved . Hope it helps you.