Q. 1 G3.9( 13 Votes )
Factorise.
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Answer :
On comparing with standard quadratic equation that is
a
we have,
a = 1, b = – 23 and c = + 120
Now here,
Product a × c = 1 × + 120 = + 120
Factors of + 120; 1 × 120; 2 × 60; 4 × 30; 8 × 15; 24 × 5; 40 × 3
Sum should be b = – 23
From above factors ( – 15m – 8m)
will give – 23m sum
therefore – 23m is replaced by ( – 15m – 8m)
Now above eq. becomes
; taking m and – 8 common
(m – 15)(m – 8)
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