Question

Simplifique as expressões algébricas.
a) x. (2x - 1) + x (1 - 3x)
b) (a + 5). (a - 5) - (a + 5)2
c) y(y + 2) – 2y- (3 - y).
d) (2 + x) - (x + 2)2​

Answer 1

a) 2x-1 + 1x- 3x
2x+1x-3x=1
x=1

b) a+5 . a - 5 - a + 5 . 2
a+ 5a - 5- a+ 10
a+5a-a = 5-10
5a= -5
a=-1

c) y+2-2y-3+y
y-2y+y = -2+3
2y=1
y=½

d) 2+x - x +2.2
x-x=-2+2.2
0= 2
x=2