document.write( "Question 1199628: find the number of critical points of f(x) = sqrt(x² - 4x) \n" ); document.write( "
Algebra.Com's Answer #833574 by josgarithmetic(39618)\"\" \"About 
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0 and 4\r
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\n" ); document.write( "\n" ); document.write( "Look at factorization for the x^2-4x.
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