Question

5(x2)+2x=125 ?? equacões exponenciais

Answer 1

$5^{x^2+2x}=125$
$5^{x^2+2x}=5^3$
$x^2+2x=3$
$x^2+2x-3$
Δ= b²-4ac
Δ= (2)²-4×1×(-3)
Δ=4-(-12)
Δ=16

x'= -b +√Δ/2a
x'= -2 +√16/2
x'= -2+4/2
x'= 1

x''= -b -√Δ/2a
x''= -2 - √16/2
x''= -2-4/2
x''= -3