Question

Uprość wyrażenie.Daje dużo punktów :)
a) (2y-3)do potęgi 2-(3y-2)(3y+2)
b) (5y+1)(1-5y)-(1+5y)do potęgi 2
c) (2x-y)(2x+y)+(3x+2y)(3x-2y)
d) (y+3x)(3x-y)-(x-5y)(x+5y)

Answer 1

a)  (2y-3)*2 - (3y - 2) (3y + 2)=(4y-9)-(12y*2-6y+8y-18)=4y-9-12y*2+2y-18=6y-27-12y*2

 b) (5y+1) (1 - 5y) - (1 + 5y)*2=(5y+1)(1-5y)-(1+25y)=(5y-25y*2+5y 5y)-(1+25y)   = 5y-25y*2-1+25y= 30y-25*2-1

 
c)  (y+3x)(3x-y) - (x-5y)(x+5y) == (3x+y)(3x-y) - (x²-25y²) == 9x²-y²-x²+25y² == 8x²+24y²