Question

Zadanie 1
Zapisz w najprostszej postaci;
a)2(x-y)(x+y)-3(x-2y)2=
b) 5(s+3t)(3t-s)-2(s+2t)2=
c)(5-2x)2+(x+√5)(x-√5)-5(x+2)2
Prosze o pomoc!!!!!!!!!

Answer 1

A) 2 * (x² - y²) (- 3x + 6y) *2 = 2x² - 2y² -6x + 12y

Answer 2

A)2(x-y)*(x+y)-3(x-2y)*2=2(x²-y²)-3(2x-4y)=2x²-2y²-6x+12y
b)=5(3ts-s²+9t²-3ts)-2(2s+4t)=15ts-5s²+45t²-15ts-4s-8t=-5s²+45t²-4s-8t
c)=(10-4x)+(x²-5)-5(2x+4)=10-4x+x²-5-10x-20=x²-14x-10