Question

Determine o 0 da função f(x)= -x²+7x-10

Answer 1

A=-1,B=7 e C=-10
=b2-4×a×c
=72-4×(-1)×(-10)
=49-40
=9
x1=-7+V9/2×-1
x1=-7+3/-2
x1=-4/-2
x1=2
x2=-7-V9/2×-1
x2=-7-3/-2
x2=-10/-2
x2=5