Question

1- Efetue
a)(+7x)+(-3x)
b)(-2y)+(-3y)
C) (+5a²)+(3a²)
d) (+6x)+(-4x)
e)(+8x)-(-3x)​

Answer 1

a)

$( + 7x) + ( - 3x) =$

$7x - 3x = 4x$

b)

$( - 2y) + ( - 3y) =$

$- 2y - 3y = - 5y$

C)

$( + 5 {a}^{2} ) + (3 {a}^{2} )$

$5 {a}^{2} + 3 {a}^{2} = 8 {a}^{2}$

d)

$( + 6x) + ( - 4x) =$

$6x - 4x = 2x$

e)

$( + 8x) - ( - 3x) =$

$8x + 3x = 11x$