Question

Find the solution of 3*sqrt(x+5=-9

x = 4; not extraneous

x = 4; extraneous

x = 0; extraneous

x = 0; not extraneous

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Answer 1

Divide both sides by 3, you get sqrt(x + 5) = -3
Square both sides, you get x + 5 = 9
x = 4, but x = 4 is extraneous as it doesnt check in the original equation.