Question

Si m a la 2 sobre 3 es =12,9m-2

Answer 1

m²/3=12,9m-2     hallar m?
m²=3(12,9m-2)
m²=38.7m-6
m²-38.7m+6=0
 Empleando la fórmula siguiente
am²+bm+c=0
m²-38.7m+6=0

tenemos:
m=(-b+√(b²-4ac))/2a⇒m=(38.7+√(1473.69))/2=-0.15
m=(-b-√(b²-4ac))/2a⇒m=(38.7-√(1473.69))/2=-38.5