Question

Find the value of the polynomial x³+2x²-3x+7 at x=2.​

Answer 1

Answer:

${x}^{3} + 2 {x}^{2} - 3x + 7 \\ \\ = {2}^{3} + 2 \times {2}^{2} - 3 \times 2 + 7 \\ \\ = 8 + 8 - 6 + 7 \\ \\ = 23 - 6 \\ \\ = 17$

Answer 2

Answer:

when x = 2

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

8+2(4)-6+7

8+8+1

17