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Find the smallest value of x such that x^2 + 10x + 25 = 18.

 Aug 8, 2021
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x^2 + 10x + 25 = 18.     re-arrange

x^2 + 10x + 7 = 0      Use Quadratic Formula to find the x values    ....then choose the smaller of the two

 

   a = 1    b = 10   c = 7

 

\(x = {-10 \pm \sqrt{10^2-4(1)(7)} \over 2(1)}\)            Calculate to finish.....

 Aug 8, 2021

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