Question

Wzory skroconego mnozenia :

a) (5x do kwadratu + 3) do kwadratu - (7x + 2) (7x - 2) + (x-4) do wkadratu = ??

Mnozenie sum algebraicznych :

a) (2x+4)(3x-5)+2(7x-1)= ??

Answer 1

a) 25x^{4}+3^{2}-7x-2*(7x-2)+x^{2}-8x+16=25x^{4}+9-49x^{2}-4+x^{2}-8x+16=25x^{4}+21-50x^{2}-8x

 

b)6x^{2}-10x+12x-20+14x-2=6x^{2}+16x-22

 

Prosze bardzo ;)

Answer 2

(2x+4)(3x+5)+2(7x-1)=(2x+4)(3x+5)+14x-2=6x(dokwadratu)-15x+12x-20=11x+6x(do kwadratu)-22