factorise: 1) 32x²-72y²
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Answer:
= 8(2x-3y) × (2x+3y)
Step-by-step explanation:
➺ 32x² - 72y²
Factor out 8 from the given expression
➺ 8(4x² - 9y²)
Use a² - b² = (a-b)(a+b)
➺ 8(2x-3y) × (2x+3y)
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