wyznacz iloczyn korzystając ze wzorów
a) (2 x^2-1) ^2
b)(x-1)(x^2+x-1)
c)(3 x+1)^3
a) (1+2x)(1-2x) = 1² -(2x)² =1 -4x²
b) (3x²-1)² = (3x²)² -2*3x²*1 -1² =9x⁴-6x²-1
c) (1-2x)³ = 1³ - 3*1²*2x + 3*1*(2x)² -(2x)³ = 1 -6x + 12x² -8x³
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a) (1+2x)(1-2x) = 1² -(2x)² =1 -4x²
b) (3x²-1)² = (3x²)² -2*3x²*1 -1² =9x⁴-6x²-1
c) (1-2x)³ = 1³ - 3*1²*2x + 3*1*(2x)² -(2x)³ = 1 -6x + 12x² -8x³