Question

simplifique as expressões???

Answer 1

a) x(2x-1)+x(1-3x)
2x²-x+x-3x²
-x²

b)(a+5)(a-5)-(a+5)²
a²-25-(a²+10a+25)
a²-a²+10a-25-25
10a-50

c)y(y+2)-2y(3-y)
y²+2y-6y+2y²
2y²-4y

d)(2+x)²-(x+2)²
4+4x+x²-(x²+4x+4)
x²-x²+4x-4x+4-4
0