Question

1 Tính 

a, A= ( 2x+3)²

b. B= (11x-2)²

c, C= (4x3y) (4x-3y)

d, D=( 2x+5)³

e, E= (x-6)³

Answer 1

\(A=4x^2+12x+9\\ B=121x^2-44x+4\\ C=16x^2-9y^2\\ D=4x^2+20x+25\\ E=x^2-12x+36\)

Answer 2

a) (2x)^2 +12x+9

b)(11x)^2 -44x +4

c)48x^2y -36xy^2

d)4x^2 +20x +25

e)x^2 -12x +36

Answer 3

a) \(A=\left(2x+3\right)^2=4x^2+12x+9\)

b) \(B=\left(11x-2\right)^2=121x^2-44x+4\)

c) \(C=\left(4x+3y\right)\left(4x-3y\right)=16x^2-9y^2\)

d) \(D=\left(2x+5\right)^3=8x^3+60x^2+150x+125\)

e) \(E=\left(x-6\right)^3=x^3-18x^2+108x+216\)

Answer 4

a,A=4x²+12x+9

b,B=121x²-44x+4

c,C=16x²-9y²

d,D=8x^3+60x²+150x+125

e,E=x^3-18x²+36x-216