B = x - x^2 + 2 Giải chi tiếtB = x - x^2 +
A.
B.
C.
D.

A = x + y ^3 + x^3 với 2x + y = 0   A = 2 A = 0 A = 1
A.\(A = 2\)
B.\(A = 0\)
C.\(A = 1\)
D.\(A = 3\)

A = x + y ^3 + x^3 với 2x + y = 0   A = 2 A = 0 A = 1
A.\(A = 2\)
B.\(A = 0\)
C.\(A = 1\)
D.\(A = 3\)

2x - 3 ^2 - 2x + 3 ^2       - 24x + 18 - 24x - 24x
A.\( - 24x + 18\)
B.\( - 24x\)
C.\( - 24x - 18\)
D.\(24x\)

x + 2 ^3 + x - 2 ^3 - 2x x^2 + 12 2x^2 - 12 0 - 2x
A.\(2{x^2} - 12\)
B.\(0\)
C.\( - 2x\left( {{x^2} + 12} \right)\)
D.\( - 2x\left( {{x^2} - 12} \right)\)

x - y x^2 + xy + y^2 - x + y x^2 - xy + y^2 + 2y^
A.\({x^3} - {y^3}\)
B.\({x^3} + {y^3}\)
C.\(0\)
D.\({x^3} + 2{y^3}\)

x^2 - 3x + 94 = - x + 32 ^2 - x - 32 ^2 x + 32 ^2
A.\( - {\left( {x + \frac{3}{2}} \right)^2}\)
B.\( - {\left( {x - \frac{3}{2}} \right)^2}\)
C.\({\left( {x + \frac{3}{2}} \right)^2}\)
D.\({\left( {x - \frac{3}{2}} \right)^2}\)

x^2 - 3x + 94 = - x + 32 ^2 - x - 32 ^2 x + 32 ^2
A.\( - {\left( {x + \frac{3}{2}} \right)^2}\)
B.\( - {\left( {x - \frac{3}{2}} \right)^2}\)
C.\({\left( {x + \frac{3}{2}} \right)^2}\)
D.\({\left( {x - \frac{3}{2}} \right)^2}\)

x - 2y ^2 + 4 x - 2y + 4 =           x + 2y - 2 ^2
A.\({\left( {x + 2y - 2} \right)^2}\)
B.\({\left( {x + 2y + 2} \right)^2}\)
C.\({\left( {x - 2y + 2} \right)^2}\)
D.\({\left( {x - 2y - 2} \right)^2}\)

x + 3y ^2 - 12xy =         x - 3y ^2 x + 3y ^2 - x
A.\({\left( {x - 3y} \right)^2}\)
B.\({\left( {x + 3y} \right)^2}\)
C.\( - {\left( {x - 3y} \right)^2}\)
D.\( - {\left( {x + 3y} \right)^2}\)