Question

4. If x=1, find the value of x^3-2x^2-7x+5.​

Answer 1

Answer:

(1)^3-2(1)^2-7(1)+5

1-2-7+5

6-9

=-3

Ans:-3

Answer 2

${x}^{3}-{2x}^{2}-{7x}+{5}$ ______(eq.)

Substituting x = 1, in the equation:-

${1}^{3}-{2}×{1}^{2}-{7}×{1}+{5}$

${1}-{2}-{7}+{5}$

${6}-{9}$

${-3}$