Factor the polynomial expression x4 + 18x2 + 81 to determine missing terms X^4+18x^2+81=( )^2+2( )x^2+ ( )^4

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Choose the more precise measurement. 26.4 cm or 8.39 cm