Question

calcule as seguintes adições :

 

a) (3a²-16ab+7b²)+(-6a²+14ab-3b²)

b)(5x²+3x-9)+(-4x²-12x-4)

c)(7a³-22ab+7b²)+(-8a³+2ab-5b²)

d) (9x-4+5x²)+(-4x²+16x-18)

e) (5x³+2x²+4)-(1-3x-8x²)

Answer 1

a) (3a²-16ab+7b²)+(-6a²+14ab-3b²)
3a²-16ab+7b² -6a²+14ab-3b²
3a² -6a² -16ab +14ab +7b² -3b²
-3a² +8ab +4b²

b)(5x²+3x-9)+(-4x²-12x-4)
5x²+3x-9-4x²-12x-4
5x² -4x² +3x -12x -9 -4
x² -9x -13

c)(7a³-22ab+7b²)+(-8a³+2ab-5b²)
7a³-22ab+7b²-8a³+2ab-5b²
7a³-8a³ -22ab +2ab +7b²-5b²
-a³ -20ab +2b²

d) (9x-4+5x²)+(-4x²+16x-18)
9x-4+5x²-4x²+16x-18
9x +16x -4 -18 +5x²-4x²
+25x - 22 +x²
x² +25x -22

e) (5x³+2x²+4)-(1-3x-8x²)
5x³+2x²+4 -1 +3x +8x²
5x³ +2x² +8x² +3x +4 -1
5x³ +10x² +3x +3