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Mathematics
Mariana Maxwell
23 May, 05:38
If a+b = 7, and a² + b²=25
then ab = ?
+5
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Jaelynn Aguilar
23 May, 06:49
0
a2+b2=25
or, (a+b) ^2-2ab=25
or, (7) ^2-2ab=25 [a+b=7]
or, 49-25=2ab
or, 24/2=an
•°• ab=12 ...
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