Question

Show that X =1 in the polynomial 3xcube- 4xsquare +8x-7

Answer 1

Step-by-step explanation:

Solution:-

if x=1 then it will be the zero of the polynomial

verification

${3x}^{3}-{4x}^{2}+8x-7=0$

$\implies{3(1)}^{3}-{4(1)}^{2}+8 (1)-7=0$

$\implies{3}^{3}-{4}^{2}+8-7=0$

$\implies{27-16+8-7=0}$

$\implies{\boxed {{12 {\cancel{=}}0}}}$