Question

Zapisz w postaci sumy algebraicznej.(Tylko nie same wyniki:P)

a)(x+1)(x+2)(x+3)=

b)(x-2)(x+5)(2x-1)=

c)(x-4)(x+1)^2=

d)(2x-3)^2(x+2)=

^=to jest do potęgi :)

Pomóżcie!!

Answer 1

a)(x+1)(x+2)(x+3)=(x²+x+2x+2)(x+3)=x³+x²+2x²+2x+3x²+3x+6x+6=x+³6x²+11x+6

b)(x-2)(x+5)(2x-1)=(x²-2x+5x-10)(2x-1)=2x³-4x²+10x²-20x-x²+2x-5x+10=2x³+5x²-23x+10

c)(x-4)(x+1)²=(x-4)(x²+2x+1)=x³+2x²+x-4x²-8x-4=x³-2x²-7x-4

d)(2x-3)²(x+2)=(4x²-12x+9)(x+2)=4x³-12x²+9x+8x²-24x+18=4x³-4x²-15x+18

 

Answer 2

a)(x+1)(x+2)(x+3)=x²+2x+ x²+3x+x+2+3+x²+3x+2x+6=3x²+11x+11

b)(x-2)(x+5)(2x-1)=x²+5x+2x²-x-2x-10-4x+2+2x²-x+10x-5=5x²+7x-13

c)(x-4)(x+1)^2=x^3+2x²+x-4x²-8x-1=x^3-2x²-7x-1

d)(2x-3)^2(x+2)=4x^3-12x²+9x+8x²-24x+18=4x^3-4x²-15x+18

 

^ jest do potegi ;)