Question

Find the value of K , if​

Answer 1

Answer:

k = -1/4

Step-by-step explanation:

(a+b) (a-b)

81y^2-k=(9y+1/2)(9y-1/2)

= [(9y)^2 -(1/2)^2]

= 81y^2 -1/4

81y^2-81y^2 -k= -1/4

-k = -1/4

k = 1/4

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Answer 2

81y²-k = (9y+½)(9y-½)

=) 81y²-k = 81y²-¼

=) 81y²-81y²-k = -¼

=) -k = -¼

=) k = ¼

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