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Solve $x^2 -81 =0$
in Grade 9 Maths by Platinum (112k points) | 26 views

2 Answers

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difference of 2 squares

(x-9)(x+9)=0

x= 9 or x= -9
by Diamond (84.9k points)
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(x-9)(x+9)

x=9 x=-9
by Bronze Status (5.8k points)

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