(1)(4x-3y)^2
=16x^2-24xy+9y^2
(2)(1.5a-2/3b)^2
=2.25a^2-2ab+4/9b^2
(3)(25x^3+15^2-20x)÷(-5x)
=5(5x^3+45-4x)÷(-5x)
=(5x^3+45-4x)÷(-x)
=-5x^2 -5/x +4
(4)(2/5y^3-7y^2+2...
(1)(4x-3y)^2
=16x^2-24xy+9y^2
(2)(1.5a-2/3b)^2
=2.25a^2-2ab+4/9b^2
(3)(25x^3+15^2-20x)÷(-5x)
=5(5x^3+45-4x)÷(-5x)
=(5x^3+45-4x)÷(-x)
=-5x^2 -5/x +4
(4)(2/5y^3-7y^2+2...