Respostas

A melhor resposta!
2014-03-20T15:13:03-03:00
 a) (4a+3b)+2(2a-7b) = (4a+3b) + (4a-14b) = (8a-11b)
b) (7x²+3x+7)+3(x²-8x+1) = (7x²+3x+7) + (3x²-24x+3) = (10x²-21x+10)
c)(y³+3y²+2y)+2(y³-3y²+6y+5) = (y³+3y²+2y) + (2y³-6y²+12y+10) = (3y³-3y²+14y+10)
d)(x²-6x+5)-4(x²+8x-9) = (x²-6x+5) - (4x²+32x-36) = (-3x²-38x+41)
e)(4a²-2a+6)-2(3a²-3a+7) = (4a²-2a+6) - (6a²-6a+14) = (-2a²+4a-8)
f)(-3ab+2a²+b²)-3(2a²+7b²+4ab) = (-3ab+2a²+b²) - (6a²+21b²+12ab) = (-15ab-4a²-20b²)
2 5 2