Question

Teorema de pitagoras
5x = 3x + 8 (todos ao quadrado)

Answer 1

5x²=3x²+8²
25x²=9x²+64
25x²-9x²=64
16x²=64
x²=64/16
x=√64/16
x=8/4
x=2

Answer 2

(5x)² = (3x)² + 8²

25x² = 9x² + 64

25x² - 9x² = 64

16x² = 64

$x^2= \dfrac{64}{16} \\\\\\\\x= \sqrt{ \dfrac{64}{16}} \\\\\\\\x= \dfrac{8}{4}\\\\\\x=2$


Forte abraço!