10k2+10k-k-1=0
10k(k+1)-1(k+1)
(k+1)(10k-1)
Written on Feb. 5, 2018, 10:41 p.m.
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Answer of this question
10k2+9k-1=0
Lipika Das
Comment
10k2+10k-k-1=0
10k(k+1)-1(k+1)
(k+1)(10k-1)
Written on Feb. 5, 2018, 10:41 p.m.