L 3 If m(x) = x2 + 3 and n(x) = 5x + 9. which expression is equivalent to (mn)(x)? 5×3 + 9×2 + 15x + 27 25×2 + 90x + 84 X2 + 5x + 12 05×2 + 24

A

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– UQHnias we have, mex) = x2+3 and m (2) = 5279 = (x) (w wil C (adu (redu (x2+3). (5249 יו X2 ( 5x+9) +3 ( 5x+ 9) 5×3+ 9×2 + 15% +27 (x) (en wil 5x349x24 158427