Mathematics">
Clase 04 - Ecuaciones Con Radicales
Clase 04 - Ecuaciones Con Radicales
Clase 04 - Ecuaciones Con Radicales
1
2
2
( a ) 2 =a =a
2
1
a = (a)2 →
( a)
2
=a
2
Ejercicios:
1
4x 2
a) − 2 = 6
3
1
4x 2
= 6+2
3
2
1
4 x 2
= (8 )2
3 Comprobación
1
4 ( 48 ) 2
2
4x 2 −2=6
= 64 3
3
1
4x
= 64 192 2 C .S .48
3 −2=6
3
4 x = 64 3
64 − 2 = 6
192
x= 8−2 = 6
4
x = 48 6=6
3x − 1
b) =3
6
2
3x − 1
= ( 3 )
2
6
3x − 1
=9
6
55
3x − 1 = 9 ( 6 ) C .S .
3
3 x = 54 + 1
55
x= 18.33
3
c) 5x − 2 + 3 = 6
5x − 2 + 3 = 6
5x − 2 = 6 − 3
( )
2
= (3)
2
5x − 2
11
C .S .
5x − 2 = 9 5
5x = 9 + 2
11
x=
5
d) x − x + 3 = − 1
( )
2
( x + 1)
2
= x+3
x2 + 2x + 1 = x + 3
x2 + 2x + 1 − x − 3 = 0
x2 + x − 2 = 0 C .S .1
( x + 2 ) ( x − 1) = 0
x+2=0 x −1 = 0
x = −2 x =1
e) 2 x + 9 = −3
( )
2
= ( −3 )
2
2x + 9
2x + 9 = 9
2x = 9 − 9 C .S .
0
x=
2
x=0
f) x 2 − 3x + 6 = 2 x 2
( ) = (2 )
2 2
x2 − 3x + 6 x2
x2 − 3x + 6 = 4 x2
0 = 4 x2 − x2 + 3x − 6
0 = 3x2 + 3x − 6
0 = 3( x2 + x − 2) C .S . −2,1
0
= x2 + x − 2
3
0 = ( x + 2 ) ( x − 1)
x+2=0 x −1 = 0
x = −2 x =1
g) 2x − 3 = x+6 C .S .9