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9. Evaluate S( x2 + 5 )3 2xdx. If we let u = x? + 5, what is du? A.+ C B. 2xdx C. 2x- dx D. x2 +5 + C 10. Refer to number 9 item. What is J(x? + 5 )3 2xdx? A. - + C B. (x1+5) + C C. (2x+5)" + C D. (x)+5 + C 2 1 1. Evaluate / v2x + 7 x2 dx. A. Sui+C B. - (2x3 ) ;+ C C. (2x3 + 7)i + C D. (2x3 + 7)i + C 12. Evaluate S ( 4x? - 5 )' 8xdx? A. 8x2 + C B. Ax 2 + C C. (4x7 -5) + C D. (4x]-5) + C 2 3