FORMULARIO
(
a+b
)
2=a2+2ab+b2
(
a−b
)
2=a2−2ab +b2
(
a+b
)
2+
(
a−b
)
2=2(a2+b2)
(
a+b
)
2−
(
a−b
)
2=4ab
a2−b2=(a+b)(a−b)
(
x+a
) (
x+b
)
=x2+
(
a+b
)
x+ab
(
a+b
)
3=a3+3a2b+3a b2+b3¿
(
a−b
)
3=a3−3a2b+3a b2−b3¿
a3+b3=
(
a+b
)
(
a2−ab+b2
)
a3−b3=
(
a−b
)
(
a2+ab +b2
)
LONGITUD
1m = 100cm
1km = 1000m
1pulg = 2,54cm
1pie = 12pulg
1yarda(yd) = 3pies
1 Anstrong(
˙
A
) =
10−8cm
1cm = 10mm
MASA
1kg = 1000g
1tn = 1000kg
1kg = 2,2lb
VOLUMEN
1
m3
= 1000L
1mL = 1
cm3
1L = 1000mL
ENERGÍA
1J =
107
erg
1cal = 4,184J
1mol = 6,023 x
1023
1onza = 16lb