Question

find the coefficient of 5 minus y whole square expansion ​

Answer 1

Coefficient of y is 10

Step-by-step explanation:

(5-y)² = 5²+y²-2×5×y

* By algebraic identity:

(a-b)² = a²+b²-2ab *

= 25+y²-10y

Coefficient of y² is 1

coefficient of y is 10

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Answer 2

Answer:

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