Factorise 84-2n-2n sq

1.	Factorise 84-2n-2n sq
Answer» 84-2n-2n²=\xa02(42-n-n²)\xa0/* Taking\xa02\xa0common /= 2( 42\xa0-\xa07n\xa0+\xa06n\xa0-\xa0n²) / splitting the middle term */= 2[7(6-n)+n(6-n)]=\xa02(6-n)(7+n)Therefore,.2,\xa0(6-n)\xa0and\xa0(7+n)\xa0are\xa0factors\xa0of\xa0given\xa0quadratic\xa0expression.

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