Question

Desarrolla las siguientes expresiones:
(X+2)(x-2)=
2x²+(3x+1)²=
(2x+1)²-(x-3)²=
5x²-(2x-2)(2x+2)=
(5x-3)²-(2x+1)(2x-1)=

Answer 1

A(x+2)(x-2)= x²-2²=x²-4

B2x²+(3x+1)²=2x²+9x²+6x+1=11x²×6x+1

C(2x+1)²-(x-3)²=((2x+1)-(x-3))((2x+1)+(x-3))=(2x+1-x+3)(2x+1+x-3)=(x+4)(3x-2)

D5x²-(2x-2)(2x+2)=5x²-(2x)²-2²=5x²-4x²-4=x²-4

E(5x-3)²-(2x+1)(2x-1)=25x²-30x+9-4x²-1=21x²-30x+9