Show that- 15ab (4a+5b)^2 - 80ab= (4a-5b)^2
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Answer:
15ab(4a+5b)²-80ab=(4a-5b)²
15ab
15ab(4a+5b)²-80ab
15ab[4a²+2(4a×5b)5b²] - 80ab
15ab(4a²+20ab+5b²)-80ab
15ab×4a²+15ab×20ab+15ab×5b²-80ab
60a³b²+300a²b²+75a²b³-80ab
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