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00:00here we have question number two or exercise 5.2 question number two
00:16we have 4x4 plus 81
00:28now we will write it in square form. so it will be 2x2 whole square plus 9 whole square
00:50now we will find out its 2a and b. so it will be 2x2 whole square plus 9 whole square plus 36x square
01:16now we will add it. so it will be 36x2. so it will be 2x2 whole square plus 9 whole square plus 36x square
01:46minus 36x square. so it will be a square plus b square plus 2ab. so it will be a plus b whole square equal to a square plus b square plus 2ab
02:15now we will write it in this form. so it will be 2x2 whole square plus 9 whole square plus 36x square
02:41now we will write it in this form. so it will be 2x2 whole square plus 9 whole square plus 6x whole square. so it will be a square minus b square
03:01so it will be a square minus b square equal to a plus b into a minus b. so it will be 2x2 whole square plus 9 whole square plus 6x whole square
03:32so it will be a plus b into a minus b. so it will be a plus b into a minus b. so it will be a plus b into a minus b. so it will be a plus b into a minus b.
03:42so it will be a plus b into a minus b. so it will be a plus b into a minus b. so it will be a plus b into a minus b. so it will be a plus b into a minus b.
03:53so it will be a plus b into a minus b. so it will be a plus b into a minus b.