Question

Evaluate. x-9fdx ○ 2 - 9x2 + 81x+C 0 3x3 _ 36x2 + 81x + 0 이 XD FBI F0 이 글 +9x2 - 81x+C

Answer 1

Expand (x-9)^2 implies,

$(x-9)^2=x^2-18x+81$

Then, the integrel becomes,

$\int x^2-18x+81dx=\frac{x^3}{3}-9x^2+81x+c$

Hence, Option A is right.