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\n
\nLet 6^x = y....(i)
\n
\n6y^x + 7y - 5 = 0
\n
\n(3y + 5)(2y - 1) = 0.....(i)
\n
\nSubt. for y from eqn. (i) in eqn. (ii)
\n
\n= [3(6^x) + 5][2(6^x) - 1]","opts",[422,423,424,425],"[3(6^x) - 5][2(6^x)m + 1]","[3(6^x) + 5][2(6^x) - 1]","[(6^x) - 5][3(6^x) + 1]","[2(6^x) + 5][3(6^x) - 1]","20","initComment","initReply","actionData","errors"]

JAMB - Mathematics (1987 - No. 20)

Explanation

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