Factorise: 2y4 – 162
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Step-by-step explanation:
2y⁴ - 162 = 2(y⁴ - 81)
= 2 [ (y²)² - (3²)² ]
= 2 (y² + 9) (y² - 9)
= 2 (y²+9) (y+3) (y-3)
hope it helps
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