SOLUTION: Hi, can you please help me? Ive tried this problem 9 times...and I keep getting it wrong... Thank you sooo much for your help! i hope you can help me... it would be soo appreciate

Question 499121: Hi, can you please help me? Ive tried this problem 9 times...and I keep getting it wrong...
Thank you sooo much for your help! i hope you can help me... it would be soo appreciated! :)
Find all real solutions of the equation. or tell if there is NO REAL SOLUTION.
squareroot of: 9x + 64+8=x

Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!

Take the square
9x+72=x^2
x^2-9x-72=0
Find the roots of the equation by quadratic formula

a= 1 ,b= -9 c -72

b^2-4ac= 81 - 288
b^2-4ac= 369
= 19.21

x1=( 9 + 19.21 )/ 2
x1= 14.1
x2=( 9 -19.21 ) / 2
x2= -5.105

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