Question

factorise
1/4 b^2 - 81​

Answer 1

Step-by-step explanation:

1/4 *b²-81

b²/4-81

(b/2)²-9²

(b/2-9)(b/2+9)

Answer 2

Answer:

(1/2b)^2-(9)^2=>(1/2b+9)(1/2b-9)

Step-by-step explanation:

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