Question

Usuń nawiasy i wykonaj redukcje wyrazow podobnych

a) (2x²+4x-3)+(-x²-2x+4)

b) (⅗m²+⅔n²+6)+(-⅓m²-⅔n²-2⅗)

c) (0,5xy²-1,2y²+5)+(-0,8y²-2,5xy²-2⅛)

Answer 1

a) (2x²+4x-3)+(-x²-2x+4) = 2x² + 4x-3- x²-2x+4 = x² + 2x + 1
b) (⅗m²+⅔n²+6)+(-⅓m²-⅔n²-2⅗) = ⅗m²+⅔n²+6-⅓m²-⅔n²-2⅗ = 9/15m2 -5/15m2 + 3 2/5 = 4/15m2 + 3 2/5
c) (0,5xy²-1,2y²+5)+(-0,8y²-2,5xy²-2⅛) = 0,5xy²-1,2y²+5-0,8y²-2,5xy²-2⅛ = -2xy² - 2y² + 2 7/8