(4ab + 3cd)²– (4ab – 3cd)²/48
= abcd
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Step-by-step explanation:
A]
48
(4ab+3cd)
2
−(4ab−3cd)
2
=
48
16a
2
b
2
+9c
2
+24abcd−16a
2
b
2
−9c
2
d
2
+24abcd
=
48
48abcd
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