Question

Resolva:
10x"+ 72x-64=0

Answer 1

Δ= 72² - 4 . 10 . (-64)
Δ= 7744
Baskhara: (Raiz quadrada de 7744 é 88)

x= $\frac{-72+-88}{20}$

x'= 16/20= 4/5
x"= 160/20 = 8