Evaluate the expression described below if the number is 4. The difference between a number squared and the number.

asked Aug 5, 2018 3.1k views

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Hello,

$x^2-x=4\\ x^2-x-4=0\\ \Delta=1^2-4*(-4)=17\\ x= (1+ √(17) )/(2) \\ or\\ x= (1- √(17) )/(2) \\$

EsotericVoid answered Aug 9, 2018

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