Rozwiń i uprość wyrażenia: 1) (11n+4)^2 - (11n-4)^2 = 2) (7a-2)^2 - (6a-1) (6a+1) = 3) (2x+5)^3 - (2x-5)^3 =

1. (11n+4)^2-(11n-4)^2=(11n)^1+2*11n*4+4^2-[(11n)^2-2*11n*4+4^2]=121n^2+88n+16-121n^2+88n-16=176 2. (7a-2)^2-(6a-1)(6a+1)=(7a)^2-2*7a*2+2^2-[(6a)^2+6a*1-6a*1-1^2]=79a^2-28a+4-36a^2+6a-6a+1=33a^2-28a+5 3. (2X+5)^3 - (2x-5^3=(2x)^3+3*(2x)^2*5+3*2x*5^2+5^3-[(2x)^3-3*(2x)^2*5+3*2x*5^2-5^3=8x^3+60x^2+150x+125-[8x^3-60x^2+150x-125]=8x^3+60x^2+150x+125-8x^3+60x^2-150x+125=120x+250

1) (11n+4)^2 - (11n-4)^2 = 121n²+88n+16-(121n²-88n+16) = 121n²+88n+16-121n²+88n-16 = 176n   2) (7a-2)^2 - (6a-1) (6a+1) =49a²-28a+4-(36a²-1) = 49a²-28a+4-36a²+1 = 13a²-28a+5   3) (2x+5)^3 - (2x-5)^3 = 8x³+60x²+150x+125-(8x³-60x²+150x-125) = 8x³+60x²+150x+125-8x³+60x²-150x+125 = 120x²+250