Question

Wykonaj działania:

a) (4x-5)² + (5+4x)²

b) (2x-1)² - 4(x-3) (x+3)

c) (x+2y)² - (x+2y) (x-2y) + 2(x-2y)² + 4xy

d) (a-2b) (3a+b) - 3(a-b)²

e) (5a+1)² + (5a-1)² - (5a+1) (5a-1) - 25a²

f) (x+3y) (3y-x) - 2(x-2)² + 3 (x²-3y²)

Cały zapis prosiłabym, nie same wyniki. Z góry dzięki : )

Answer 1

a 16x^2-25+25+16x^2=32x^2

b 4x^2-1-(4x^2+12x-12x+12)=4x^2-1-4x^2+12=11

c x^2+4y^2-x^2+4y^2+2x-4y^2+4xy=4y^2+2x+4xy

d 3a^2+ab-6ab-2b^2-3(a^2-2ab+b^2)=3a^2+ab-6ab-2b^2-3a^2+6ab-3b^2=-5b^2+ab

e 25a^2+1+25a^2-1-(25a^2-5a+5a-1)=25a^2+1+25a^2-1-25a^2+5a-5a+1=25a^2+1

f 3xy-x^2+9y^2-3xy-2x^2+8+3x^2-9y^2=8