III .rerci.l"el 9 ",,,110. delermille whiclr of lire gil'l'n sl,"sets fuml (/ "(IJ"i ~ for 1'2. xpr(,u 51! - 31 + 8 liS a linear com"i lIalioll of tile reclOrs il! each ,\'IIb,I'el Iilm i,I' a "luis,(a) (/ 2 + 1.1 _ 1./ + II (b) (1 2 + I. I - 1)

L35 - 14 ▯ 2 ▯ 2 ex. Evaluate: x 4 − x dx −2 ex. Find the area between the x-axis and f(x)= x −4x2 from x = −2to x =2.