Using Identity (a-b) ² = a² + b² - 2ab , find (5a-4b) ² *
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Answer:
25a^2+16b^2-40ab
Step-by-step explanation:
(5a-4b)^2
(5a)^2+(4b)^2-2(5a)(4b)
25a^2+16b^2-40ab
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(5a-4b)2
(5a)2+(4b)2-2(5a)(-4b)
25a2+16b2-40ab
(5a)2+(4b)2-2(5a)(-4b)
25a2+16b2-40ab
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