yeah, but what do with 3x+6x+9=29?I am not sure how to solve this quadratic expression. I know 3x is raised to the second power, just can't figure how to use the tools on this site yet.
thank you for your article,My problem has been resolved.
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x² + (x + 3)² = (√29)²
x² + x² + 6x + 9 = 29
2x² + 6x – 20 = 0
x² + 3x – 10 = 0
x = [– 3 ± √(3² + 40)]/2
= [– 3 ± √49]/2
= (– 3 ± 7)/2
= taking + ve values
x = (– 3 + 7)/2 = 2
sides are 2, 5, √29 units
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