Evelina783
A) (2x+3b)²=4x²+12xb+9b² b) (2√3-3x)²=12-12√3x+9x² c) (4x²+3xy)²=16x^4+24x³y+9x²y² d) (2-2xy)²=4-8xy+4x²y² e) (3x²+16y)²=9x^4+96x²y+256y² f) (3xy+4x)(4x-3xy)=-9x²y²+16x²
Zad.2 a) 3(2x+1)²-2(x-1)²+(x-3)(x+3)=3(4x²+4x+1)-2(x²-2x+1)+x²-9= 12x²+12x+3-2x²+4x-2+x²-9=11x²+16x-8
b) (2√3 - 3x)² = 12 - 12√3 + 9x²
c) (4x² + 3xy)² = 16x^4 + 24x³y + 9x²y²
d) (2 - 2xy)² = 4-8xy + 4x²y²
e) (3x² + 16y)² = 9x^4 + 96x²y + 256y²
f) (3xy + 4x)(4x - 3xy) = 16x² - 9x²y²
a) 3 (2x + 1)² - 2 (x - 1)² + (x - 3) (x + 3) =3(4x²+4x+1)-2(x²-2x+1) + x²-9 =
=12x²+12x+3-2x²+4x-2 + x²-9 = 11x²+16x-8
(2x+3b)²=4x²+12xb+9b²
b)
(2√3-3x)²=12-12√3x+9x²
c)
(4x²+3xy)²=16x^4+24x³y+9x²y²
d)
(2-2xy)²=4-8xy+4x²y²
e)
(3x²+16y)²=9x^4+96x²y+256y²
f)
(3xy+4x)(4x-3xy)=-9x²y²+16x²
Zad.2
a)
3(2x+1)²-2(x-1)²+(x-3)(x+3)=3(4x²+4x+1)-2(x²-2x+1)+x²-9=
12x²+12x+3-2x²+4x-2+x²-9=11x²+16x-8