find the square of 2x-5y by using identities
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Answer:
4x² +9y²-12xy
Step-by-step explanation:
(2x-5y)²
(a-b)² = a² + b² -2ab
a = 2x b = 5y
(2x-5y)² = (2x)² +(3y)² - 2 (2x)(3y)
= 4x² +9y²-12xy
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