Question

Efetue no caderno as adições algébricas.
a) -yb²+yb²-7yb²+15yb²
b) 0,5x + 1,4x + 2,8x - 2x

Answer 1

vamos lá...

a)

-yb² +yb² -7yb² +15yb²=

-8yb² +16yb²= 8yb²

b)

0,5x +1,4x +2,8x -2x=

4,7x -2x= 2,7x

Answer 2

Olá,

Vamos lá,

a) -yb²+yb²-7yb²+15yb²
= -7yb²+15yb²
= 8yb²


b) 0,5x + 1,4x + 2,8x - 2x
= 2,7x