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solve this plzzzzzzzzzzzzzzzzzzzzz
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Step-by-step explanation:
81y^2-k^2 = 9y^2 × -1/2^2
by 3 rd identify
81y^2 = 9y^2
therefore k^2 = -1/2^2
k=-1/2
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Answer:
explanation:
81y2-k2
= (9y)2-(rootk)2
( 9y+vk) ( 9y-vk)= (9y+1/2) ( 9y-1/2).
..given
comparing
k= 1/2
thus
k = 1/4