Question

wzory skróconego mnożenia w załączniku na jutro!!!!

Answer 1

Zad1.

(y-5)^{2}=y^{2}-10y+25

(b+3)^{2}= b^{2}+6b+9

(x-6)*(x+6)= x^{2}-6^{2}=x^{2}-36

Zad2

(7-x)^{2}+(x+7)^{2}= 49-14x+x^{2} + x^{2}+14x+49=2x^{2}+98

Zad3.

(3x-5y)^{2}-(3x+5y)^{2}= 9x^{2}-30xy+ 25y^{2} - (9x^{2}+30xy+25y^{2})=

9x^{2}-30xy+ 25y^{2} - 9x^{2}-30xy-25y^{2}= -60xy

Zad4

25x^{2}-60x+36= (5x-6)^{2}

9a^{2}+6ab+b^{2}= (3a+b)^{2}

64x^{2}-36y^{2}= (8x-6y)*(8x+6y)