zad. 19 str. 165
Zredukuj wyrazy podobne.
a)-4x-7-3x+7
b)x-2xy+½x-⅓xy
c)-x²+y²-2x²-2y²
d)-x²+2x-3x+x²
e)4x+4-7x-½
f)-2ab+12a-4ab-16a
P.S Proszę.. o jak najszybsze rozwiązanie.. ;) Błagaam.. ;p
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a)-4x-7-3x+7 = -4x - 3x - 7 + 7 = -7x
b)x-2xy+½x-⅓xy = x + 1/2x - 2xy - 1/3xy = 3/2x - 7/3xy
c)-x²+y²-2x²-2y² = -x² - 2x² + y² - 2y² = - 3x² - y²
d)-x²+2x-3x+x² = -x² + x² + 2x - 3x = -x
e)4x+4-7x-½ = 4x - 7x + 4 - 1/2 = -3x + 7/2
f)-2ab+12a-4ab-16a = -2ab - 4ab + 12a - 16a = - 6ab - 4a