please solve this question it is expansion please solve this question with the appropriate formula and also write the formula side
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Step-by-step explanation:
(4x - 5y)^2 - (3)^2
16x^2 +25y^2- 40 xy - 9
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Step-by-step explanation:
(16x-20xy+12x)+(-20y*y-15y)+(-20x+25y-15)
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