(y-9)(y+9) solve by using identities
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Answered by
5
Answer:
(y-9)(y+9) = y^2 - 9^2 = y^2 - 81
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Answered by
0
Answer:
y(y+9) -9(y+9)
y²+9y-9y-81
y²-81=0
y²=81
y=9 ..... by taking square root on both the sides
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