Question

(x+ 2 ) ³ = x³+ 5

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Answer 1

x

x 2

x 2 −2x=−2(3−x)

x 2 −2x=−2(3−x)x

x 2 −2x=−2(3−x)x 2

x 2 −2x=−2(3−x)x 2 −2x=−6+2x

x 2 −2x=−2(3−x)x 2 −2x=−6+2xx

x 2 −2x=−2(3−x)x 2 −2x=−6+2xx 2

x 2 −2x=−2(3−x)x 2 −2x=−6+2xx 2 +4x+6=0 → Quadratic

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Answer 2

Answer:

A grouped frequency table with class intervals of equal sizes using 250 -270 (270 not included in this interval) as one of the class intervals is constructed for the following data: 268, 220,368, 258, 242,310, 272, 342, 310, 290, 300, 320, 319,304,402,318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236. The frequency of the class 370-390 is: 5