zad . 1 Wykonaj mnożenie i zredukuj wyrazy podobne .
a)
b)
zad. 2 Zapisz w postaci sumy algebraicznej .
a) (x+1)(x+2)(x+3)
b) (x-2)(x+5)(2x-1)
zad. 3 zapisz w postaci sumy algebraicznej.
a) (2x+5)*(2x+5)
* - to inaczej razy jakby ktoś nie wiedział . ;pp
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zad1
a) (x-1) (x³ + x² +x + 1) = x⁴ + x³ + x² + x - x³ - x² - x -1 = x⁴ -1
b) (x+1) (x³ - x² + x -1 ) = x⁴ - x³ + x² - x + x³ - x² + x - 1 = x⁴ -1
zad2
a) (x+1)(x+2)(x+3) = (x² + 2x + x +2 ) (x+3) = (x² + 3x +2) ( x+3) = x³ + 3x² + 3x² + 9x + 2x +6 = x³ + 6x² + 11x + 6
b) (x-2)(x+5)(2x-1) = ( x² + 5x -2x -10) (2x -1) = (x² + 3x -10) (2x-1) = 2x³ - x² + 6x² - 3x -20x + 10 = 2x³ + 5x² -23x +10
zad3
(2x+5)*(2x+5) = 4x² + 10x + 10x + 25 = 4x² + 20x + 25
zad1
(x-1)(x³+x²+x+1) = x⁴+x³+x²+x-x³-x²-x-1 = x⁴-1
(x+1)(x³-x²+x-1) = x⁴-x³+x²-x+x³-x²+x-1 = x⁴-1
zad2
(x+1)(x+2)(x+3) =(x²+2x+x+2)(x+3) = (x²+3x+2)(x+3) =x³+3x²+3x²+9x+2x+6 = x³+6x²+11x+6
(x-2)(x+5)(2x-1) = (x²+5x-2x-10)(2x-1) = (x²+3x-10)(2x-1) = 2x³-x²+6x²-3x-20x+10 = 2x³+5x²-23x+10
zad3
(2x+5)(2x+5)= 4x²+10x+10x+25 = 4x²+20x+25