SOLUTION: 25x² + 40x +16 = 28

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Question 287067: 25x² + 40x +16 = 28
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
25x%5E2+%2B+40x+%2B+16+=+28
I can see that the left side is
%285x+%2B+4%29%5E2%2C+so%0D%0A%7B%7B%7B%285x+%2B+4%29%5E2+=+28
Take the square root of both sides
5x+%2B+4+=+sqrt%284%29%2Asqrt%287%29
5x+%2B+4+=+2%2Asqrt%287%29
5x+=+2%2Asqrt%287%29+-+4
x=+%282%2Asqrt%287%29+-+4%29%2F5
and
x+=+%28-2%2Asqrt%287%29+-+4%29%2F5