Uprość wyrażenia
a) -4
b)
c)
Wyłacz przed nawias
a)
b) 5y^2 - 15y^2+20y^3 =
1.
-4(x/2) * (-2x/4) = (-2x) * (-x/2) = 2x²/2 = x²
3(a²-4)-(a²+2) = 3a²-12-a²-2 = 2a²-14
-3(2x-1)(x+6) = -3(2x²+12x-x-6) = -3(2x²+11x-6) = -6x²-33x+18
2.
5r² r r
---- + ---- + ---- = (r/3)*(5r/2 + 1 + 1) = (r/3)*(5r/2 + 2)
6 3 3
5y²-15y²+20y³ = 5y²(1-3+4y) = 5y²(-2+4y)
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1.
a)
-4(x/2) * (-2x/4) = (-2x) * (-x/2) = 2x²/2 = x²
b)
3(a²-4)-(a²+2) = 3a²-12-a²-2 = 2a²-14
c)
-3(2x-1)(x+6) = -3(2x²+12x-x-6) = -3(2x²+11x-6) = -6x²-33x+18
2.
a)
5r² r r
---- + ---- + ---- = (r/3)*(5r/2 + 1 + 1) = (r/3)*(5r/2 + 2)
6 3 3
b)
5y²-15y²+20y³ = 5y²(1-3+4y) = 5y²(-2+4y)