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81x²-9=0 I have to use the Qaudratic Formula
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81x²-9=0

I have to use the Qaudratic Formula

User Ctwheels
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81x^2-9=0 \\ \\ (9x-3)(9x+3)=0 \\ \\9x-3=0 \ \vee \ 9x+3=0\\ \\9x=3/:9 \ \vee \ 9x=-3/:9\\ \\ x= (3)/(9) \ \vee \ x=- (3)/(9)\\ \\ x= ( 1)/( 3) \ \vee \ x=- ( 1)/(3)


User Abkarino
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