Укажите все выражения, являющиеся квадратом двучлена. (3x)² (-2x-1)² (-3+5x)² (x+1)²-1 4x²-0,5 (x²-3x-1)² -3×(4x+5)²

(3x)² is a square of a binomial.

(-2x-1)² is a square of a binomial.

(-3+5x)² is a square of a binomial.

(x+1)²-1 is not a square of a binomial.

4x²-0.5 is not a square of a binomial.

(x²-3x-1)² is a square of a binomial.

-3×(4x+5)² is not a square of a binomial.