Respuestas
Respuesta:
a) = 157 / 25 b) = - 2 / 3 c) = 1 / 12 d) = 16
Explicación paso a paso:
a) 3x² - 2x +5 para x = - 2/5 c) √x + y / x² +2y para x = -2 y = 11
= 3 ( - 2/5 )² - 2 ( - 2/5 ) +5 = √ ( -2 ) + 11 / ( -2 )² +2 ( 11 )
= 3 ( 4/25 ) + 4/5 + 5 = √ -2 + 11 / 4 +22
= 12/ 25 + 4/5 +5 = √ 9 / 26
= 12 +20 + 125 / 25 = 3 / 26
= 157 / 25 = 1 / 12
b) 2xy +y² para x = y = -2 d) 3(x-y)² - 1/2 (y²+3x) x = - 3 y = - 1
y + 2x³ = 3 ( (-3) - ( -1))² - 1/2 ((-1)² + 3( -3))
= 3 ( -3 + 1 )² - 1/2 (1 - 9 )
= 2(( - 2) . ( -2 )) + ( - 2 ) ² = 3 ( - 2 )² - 1/2 ( - 8 )
( - 2 ) + 2 ( _ 2 )² = 3 (4) + 8/2
= 12 + 8/2
= 2 ( 4 ) +4 = 12+ 4
- 2 + 2 ( - 8 ) = 16
= 8 +4/ - 2 - 16
= 12 / - 18
= - 2 / 3
espero lo comprendas