Using the formula (a+b) square= a2+2ab+b2
Evaluate (730) square
(Number-8 from the picture)
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Answer:
(a+b)²= a²+2ab+b²
(730)²
•(700+30)²
•(700)²+2*700*30+(30)²
•490000+42000+900
• 532900
hope it's helpful
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