5. Factorise
25x2 + 16y2 + 47 - 40xy + 16yz - 20xz
(ii)
9a2 + 462 + 16c2 + 12ab - 16bc - 24ca
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Answer:
4_#79!/&&-()89)!:'"#@3&-79=?/75-8&&904$&25
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