calcula el valor numerico de las expresiones algebraicas siguientes :
a) 4ab - 5b + 3ab , si a =3,b =2/3,c = -1
b) ( x+y )( x-y ) + 2xy , si x = 1/4 ,y = -2/5
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Es muy facil es simplemente sustituir los valores numericos vamos con el primero:
a) 4ab-5b+3ab Si a=3 b=2/3 c=-1
4(3)(2/3)-5(2/3)+3(3)(2/3) si te fijastes unicamente sustitui los valores
8-10/3+6
32/3 ó si no te gustan las fracciones 10.66
b) (x+y)(x-y)+2xy Si x=1/4 y=-2/5
(1/4+(-2/5))(1/4-(-2/5))+2(1/4)(-2/5)
(-3/20)(13/20)+(-1/5)
-119/400 ó -0.297
Solo debes reemplazar el valor en cada letra
a) 4ab - 5b + 3ab ..........................., si a =3,b =2/3,c = -1
4.3.2/3 - 5.2/3 + 3.3.2/3 =
8 - 10/3 + 6 =
14 - 10/3 =
(42 - 10)/3 = 32/3
b) ( x+y )( x-y ) + 2xy ,............................. si x = 1/4 ,y = -2/5
( 1/4+ -2/5 )( 1/4 -(- 2/5) ) + 2(1/4)(-2/5)
-3/20 * 13/20 + (-4/20) =
10/20 - 4/20 = 6/20 = 3/10
espero que te sirva, salu2!!!