(3.6 + 6.4)
(3.6 - 6.4)
- (3.6 - 6.4)² = ?
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Answer:
(3.6)^2-(6.4)^2-[(3.6)^2+(6.4)^2-2×3.6×6.4]
by opposite signs two terms are cancel
=+2×3.6×6.4=46.08
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