Question

Efetue as seguintes subtraçoes de polinomios?
a) (4x ao quadradro-4x+5) - (2x ao quadrado +7x-1)
b) (6a-3b+2c)-(2a-2b+5c)
c) (7ab+2c-3a)-(5ab-4a+c)

Answer 1

  a) 3x² - 4x + 5 - (2x² + 7x - 1) = 3x² - 4x + 5 - 2x² - 7x + 1 = x² - 11x + 6 

b) 6a - 3b + 2c - ( 2a - 2b + 5c) = 6a - 3b + 2c - 2a + 2b + 5c = 4a - b + 7c 

c) 7ab + 2c - 3a - (5ab - 4a + c) = 7ab + 2c - 3a - 5ab + 4a - c = 2ab + a + c 

d) 94x³ - 5x² -2 - (7 - 6x³) = 94x³ - 5x² - 2 - 7 + 6x³ = 100x³ - 5x² - 9

Answer 2

a)(4ײ-4×+5)-(2ײ+7×-1)=
4ײ-2ײ-4×-7×+5+1=
[2ײ-11×+6]
b)(6a-3b+2c)-(2a-2b+5c)=
6a-2a-3b+2b+2c-5c=
[4a-b-3]
c)(7ab+2c-3a)-(5ab-4a+c)=
7ab-5ab+2c-c-3a+4a=
[2ab+c-a]