= (2p) + (3m) +
+9m +
x 4n+ 2 x 2pxD
+ 2 x 2px 3m + 2x
12pm +
+
+
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(2p+3m+4n)2. = 2p + 3m + _____ + 2×2×2p×_____×4n+2×2p×______=______+9m²+16n²+12pm+24 mn+16pn
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