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2 square root x-3 + 4 = x+1
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\[2\sqrt{x-3} + 4 = x+1\]
always true!
2sqrt(x-3)=x-3 square both sides: 4x - 12 = x^2 - 6x + 9 x^2 - 10x + 21 = 0 (x-7)(x-3) = 0 x=7 or x=3
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