Respostas
A) (x+2)²
(x+2) (x+2)
x(x+2) + (x+2)
x²+2x+2(x+2)
x²+2x+2x+4
x²+4x+4
B) (2x+3y)²
(2x+3y)²
2x(2x+3y)+ 3y (2x+3y)
4x²+6xy+3y(2x+3y)
4x²+12xy+9y²
C) (x³+3x)²
(x³+3x) (x³+3x)
(x³+3x).x³+3x(x³+3x)
(x⁶+3x⁴+3x(x³+3x)
x⁶+3x⁴+3x⁴+9x²
x⁶+6x⁴+9x²
D) (5-3b)²
(-3b+5)²
(-3b+5) (-3b+5)
-3b(-3b+5) +5(-3b+5)
9b²-15b+5(-3b+5)
9b²-15b-15b+25
9b²-30b+25
E) (2x-y³)²
(-y³+2x)²
(-y³+2x) (-y³+2x)
(-y³+2x) (-y³)+2x(-y³+2x)
-(-y³+2x).y³+2x(-y³+2x)
-(-y³.y³+2xy³)+2x(-y³+2x)
-(2xy³-y³.y³)+2x(-y³+2x)
-2xy³-1(-y³).y³+2x(-y³+2x)
-2xy³+y³y³+2x(-y³+2x)
-2xy³+y⁶+2x(-y³+2x)
y⁶-2xy³+2x(-y³+2x)
y⁶-2xy³-2xy³+4x²
y⁶-4xy³+4x²
F) (5x+4y)²
(5x+4y) (5x+4y)
5x(5x+4y(5x+4y)
25x²+20xy+4y(5x+4y)
25x²+20xy+20xy+16y²
25x²+40xy+16y²
G) (7-y)²
(-y+7)²
(-y+7) (-y+7)
(-y+7) (-y) +7(-y+7)
-(-y+7).y+7(-y+7)
-(y(-y)+7y)+7(-y+7)
-(-yy+7y)+7(-y+7)
-(-y²+7y)+7(-y+7)
y²-7y+7(-y+7)
y²-7y-7y+49
y²-14y+49
H) (5a+b³)²
(b³+5a)²
(b³+5a) (b³+5a)
(b³+5a).b³+5a(b³+5a)
b⁶+5ab³+5a(b³+5a)
b⁶+5ab³+5ab³+25a²
b⁶+10ab³+25a²
I) (√6+e)²
26.7058630125
J) (2x⁸-6y)²
(2x⁸-6y) (2x⁸-6y)
2(2x⁸-6y).x⁸-6y(2x⁸-6y)
4x¹⁶-12yx⁸-6y(2x⁸-6y)
4x¹⁶-12yx⁸-12yx⁸+36y²
4x¹⁶-24yx⁸+36y²
K) (4x-y²)²
(-y²+4x)²
(-y²+4x) (-y²+4x)
(-y²+4x) (-y²)+4x(-y²+4x)
-(-y²+4x).y²+4x(-y²+4x)
-(-y².y²+4xy²)+4x(-y²+4x)
-(4xy²-y².y²)+4x(-y²+4x)
-4xy²-1(-y²).y²+4x(-y²+4x)
-4xy2+y²y²+4x(-y²+4x)
-4xy²+y⁴+4x(-y²+4x)
y⁴-4xy²+4x(-y²+4x)
y⁴-4xy²-4xy²+16x²
y⁴-8xy²+16x²
(Obs: não consegui responder a (L) mais espero ter ajudado