Question

x 2 – 2x – 80 factorise it with quadratic trinomial

Answer 1

$Given \: Quadratic \: expression :$

$x^{2} -2x - 80$

/* Splitting the middle term,we get */

$= x^{2} - 10x + 8x - 80$

$= x( x - 10 ) + 8( x - 10 )$

$= (x-10)( x + 8 )$

Therefore.,

$\red{ Factors \: of \: x^{2} -2x - 80 }$

$\green { = (x-10)( x + 8 )}$

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