Question

me ayudan por favor ​

Answer 1

Respuesta:

$1$

$1)( - 3 {y}^{2} + 10y - 5 ) + (5 {y}^{2} + 5y + 8) = - 3 {y}^{2} + 10y - 5 + 5 {y}^{2} + 5y + 8 = 2 {y}^{2} + 15y + 3$

$2)( - 7 {x}^{2} - 5x + 11 ) + (5 {x}^{2} + 4x - 9) = - 7 {x}^{2} - 5x + 11 + 5 {x}^{2} + 4x - 9 = - 2 {x}^{2} - x + 2$

$3)(9 {a}^{3} - 2 {a}^{2} + 7 ) + (3 {a}^{3} + 8a - 4 ) = 9 {a}^{3} - 2 {a}^{2} + 7 + 3 {a}^{3} + 8a - 4 = 12 {a}^{3} - 2 {a}^{2} + 8a + 3$

$4)(3 {x}^{2} - 2x + 4) - ( {x}^{2} + x - 6 ) = 3 {x}^{2} - 2x + 4 - {x}^{2} - x + 6 = 2 {x}^{2} - 3x + 10$

$5)(4 {s}^{3} + 4 {s}^{2} - 5s - 2) - ( - 2 {s}^{2} - 5s + 6 ) = 4 {s}^{3} + 4 {s}^{2} - 5s - 2 + 2 {s}^{2} + 5s - 6 = 4 {s}^{3} + 6 {s}^{2} - 8 = 2(2 {s}^{3} + 3 {s}^{2} - 4 )$