Question

(2x³+3x²-2x+1)+(-2x³-3x²+7x-2

Answer 1

(2x³+3x²-2x+1)+(-2x³ - 3 x² + 7x-2)
3x² - 2 x + 1 + 1 - 3 x² +7x-2
-2x+1+1+7x-2
5x+1+1-2
5 x + 0
5 x + 0 =
5x

Bons Estudos!!

Answer 2

(2x³+3x²-2x+1)+(-2x³-3x²+7x-2)
2x³ + 3x² - 2x + 1 - 2x³ + 3x² - 7x +2
0x³ + 4x² - 9x +3
ou seja...
6x² - 9x + 3
aí se tiver que fazer Bhaskara
DELTA = b² - 4.a.c
DELTA = (-9)² - 4.6.3
DELTA = 81 - 72
DELTA = 9

X = -b +/- RAIZ(DELTA)/2.a
então...
X' = -(-9) + RAIZ(9)/2.6
X' = +9 + 3/2.6
X' = 12/12
X' = 1
e
X" = -(-9) - RAIZ(9)/2.6
X" = +9 - 3 /12
X" = 6/12
X" = 0,5