NECO: Further mathematics objective and theory posted here

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Further Mathematics (Objective)_* 

01-10 : CBDCBDBECA
11-20 : CCBBDDDBAC
21-30 : BAAAAEBCDB
31-40 : CDDDBBBBDA
41-50 : CDDBCDDBAC

*Completed ✔💯*

_Best of Luck_ 😉
(2)
7x² – x(x+13) = 15
7x² – x² – 13x = 15
6x² – 13x – 15 = 0
(x + 13) = -b/a = 13/6
x13 = c/a = 13/6

(2ai)
x² +13² = (x+13)² – 2×13
= (13/6)² – 2 (-15/6)
= 169/36 + 30/6
= 169+180/36
= 349/36

(2aii)
1/x1 + 1/341
= 3 + 1 + x + 1/(x + 1)(3+1)
= (x + 3) +2/x3+(x+3)+1
= 13+2/6
= -15/6 + 13/6 +1
= 13/6 + 2/1 ÷ -15/6 +13/6 +1
= 13 + 12/6 ÷ 15+13+6/6
= 25/6 ÷ 4/6
= 25/6 x 6/4
= 25/4

Posted by Da WebGeek

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Updated: June 28, 2018 — 12:17 pm

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