Question

Dados os polinômios A = 2x - 4 ,  B = 5X - 3 e C = 2x + 5 CALCULE:

a)A+B

b) AB - BC

c) A² - 2B

d)A . B

e) A . C

f) B . C

Answer 1

A) 2x-4+5x-3
7x-7

B) (2x-4).(5x-3)-(5x-3).(2x+5)
(10x²-6x-20x+12)-(10x²+25x-6x-15)
10x²-6x-20x+12-10x-25x+6x+15
-20x+15+12
-20x+27

C) (2x-4)²-2.(5x-3)
(4x-16)-(10x-6)
4x-16-10x+6
-6x-10

D) (2x-4).(5x-3)
10x²-6x-20x+12
10x²-26x+12

E) (2x-4).(2x+5)
4x²+10x-8x-20
4x²+2x-20

F) (5x-3).(2x+5)
10x²+25x-6x-15
10x²+19x-15

Espero ter ajudado! Abraço