Question

me ajuuudem pfvr 10x²+72-64=0

Answer 1

10x²+72x-64=o(:2)
5x²=36x-32=0
D=1296-4(5)(-32)
D=1296=640
D=1936
x=36=+-44/10
            x'=8/10=4/5
            x''=-80/10=-8

Answer 2

divida tudo por 2 para facilitar os cálculos
5x²+36-32=0
∆=1296-4.5.-32
∆=1296+640
∆=1930
(-36+-44)/10

x'=8/10=4/5
x"-80/10=-8