Question

Matematyka z plusem, klasa 2,Nowa wersja zadanie 12 str. 83

Zapisz w postaci sumy algebraicznej:

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

c)(x-4)(x+1)

Oraz zadanie 13 str 83

a)(x+1)(x-2)+(x+2)(x-1)

b)(5k+n)(k-2n)-k(4k+n)

c)(4y+3)(y-2)-2y(4-2y)

Z góry dzięki ;)

Answer 1

12

a) + 2x + + 3x + x + 2 +x +3 + +3x + 2x + 6 = + 12x + 13
c)(x-4)( + 1) =  + x - 4

13
a) - 2x +x - 2 + - x + 2x - 2 = - 2
b) - 10kn + kn - - - kn = 10kn + +
c)   - 8y + 3y - 6 - 8y + = + 3y - 6

Answer 2

a)(x² +2x +x+2)(x+3)=(x²+3x+2)(x+3)=x³+3x²+3x²+9x+2x+6=6x²+x³+11x+6

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

a)(x²-2x+x-2)+(x²-x+2x-2)=x²-2x+x-2+x²-x+2x-2=2x²-4

b)(5k²-10nk+nk-2n²-4k²-nk=10nk+k²-2n²

c)(4y²-8y+3y-6)-(8y+4y²)=4y²-8y+3y-6-8y-4y²=-13y-6