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anonymous
 5 years ago
how do u solve by factoring, completing the sqaure or using the quadratic formula on this problem
x^28x=5
anonymous
 5 years ago
how do u solve by factoring, completing the sqaure or using the quadratic formula on this problem x^28x=5

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dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0For factoring set it equal to zero >x^2 8x 5 = 0 Then see if any factors of 5 add up to 8 if there are none it is prime For completing the square, take half of 8 which is 4 and square it subtract that from 5 _> x^28x5 = (x4)^25(4)^2 = (x4)^2 21 = 0 For quadratic formula which really is the same as completing the square use the formula x = b +sqrt(b^24ac)/2a

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0k thank you soooo much i used the completeting the sqaure. so thats the answer

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0once you solve for x yes (x4)^2 = 21 x4 = sqrt(21) x= 4 + sqrt(21)
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