Question

The coefficient of y in the expansion (5-y)² + 6(2-y)

Answer 1

Answer:

16

Step-by-step explanation:

(5-y)² + 6(2-y)

25-10y+y² + 12-6y

y²+37-16y

Answer 2

$\tt{ {(5 - y)}^{2} + 6(2 - y)= {(25 + y²)} + (12 - 6y) }$

$\implies{\tt{y² + 37 - 6y}}$

$\tt{so \: coefficient \: of \: y\: \huge{\boxed{\boxed{ - 6}}}}$

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