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Algebra 8 Online
OpenStudy (anonymous):

x=-6+4Sqrt(7x+9)

OpenStudy (solomonzelman):

x+6 = 4√(7x+9) (x+6)^2 = ( 4√(7x+9) )^2 (square both sides) x^2+12x+36 = 16 (7x+9) x^2+12x+36 = 112x+144 x^2-100x = 108 (x+10)^2= 108 x+10 = √(108)= √(36) × √(3) = 6√(3) x = 6√(3)-10 Don't understand? Just ask!

OpenStudy (solomonzelman):

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