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00:00 - 00:59 | the question is that simplify X + Y + b whole square + X + y by 2 + led by 3 whole square minus x by 2 + y by 3 + Z by 4 whole square here will use a rule which says a + b + C whole square is equal to a square + b square + c square + 2 AV + 2 b c plus two CA no using this we get X square + Y square + Z square + 2 X Y + 2 x z + 2 Y Z plus for the second term this is X square + Y square by 4 + Z |

01:00 - 01:59 | square by 9 + 2 into X into 5 by 2 + 2 into why by 2 into Z by 3 + 2 into 3 into X this is the second one and for the last one we get x square by 4 + Y square by 9 + Z Square by 16 + 2 into X by 2 into why by 3 + 2 into y by 3 into Z by 4 + 2 into X by 2 into Z by 4 show in the next step this will give X square + Y square + Z square + 2 X Y + 2 x z + 2 y z + x square + Y square |

02:00 - 02:59 | by 4 + Z Square by 9 + xy + y z by 3 + 2 z x minus x square by 4 minus y square by 9 - Z Square by 16 - x y by 3 minus y z by 6 minus x z by 4 now taking the square terms common we get x square and one plus one minus 1 by 4 + Y square we get 1 + 1 by 4 minus 1 by 9 plus for Z Square we get 1 + 1 by 9 - 1 by 16 them for X why we get 2 + 1 - 1 |

03:00 - 03:59 | three plus for y z we get 2 + 1 by 3 minus 1 by 6 and 4 ZX we get 2 + 2 - 1 by 4 9 we need to simplify those expressions inside the bracket and will get this implies x square taking 4 as LCM 4 + 4 - 1 + Y square taking 36 as LCM 36 + 9 - 4 + Z Square taking 144 as LCM we get 144 + 16 - 9 and Forex why taking 3 AS LCM we get 6 + 3 - 1 |

04:00 - 04:59 | call Y Z dating 6 as LCM we get 12 + 2 - 1 and for that X taking 4 as LCM we get 8 + 8 - 1 this gives x square into 4 + 48 - 17 by 4 + Y square into 41 B 36 + Z square into 151 by 144 plus xy in 28 by 3 + y z into 13 by 6 plus ZX into 15 by 40 finally this can be written as 7 by 4 x square + 4136 Y square + 151 by 144 z square + 83 x |

05:00 - 05:59 | Y + 3 by 6 y z + 15 by 40 X I hope you understood definition thank you |