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= 7x - 5y
b. 2A-3B = 2 ( 3x-2y) -3 (4x-3y)
= 6x - 4y -12x + 9y
= -6x + 5y
c. AB = (3x-2y)x(4x-3y)
= 12x²-17xy+6y²
D. A²-B² = (A+B)(A-B)
= (7x-5y)(-x+y)
= -7x²+12xy-5y²
b) 2A-3B= 2(3x-2y) - 3(4x-3y)
=6x-4y -12x +9 y
= -6x+5y
c) AB = A*B = (3x-2y) * (4x-3y) = 12x^2 - 9xy -8xy + 6y^2 = 12x^2-17x+6y^2
D)A^2 - B^2 = (3x-2y)^2 =(3x-2y)(3x-2y) - (4x-3y)(4x-3y)
9x^2-6xy-6xy+4y^2 - 16x^2-12xy -12xy+9y^2
9x^2-12xy+4y^2 -(16x^2-24xy+9y^2)
9x^2-12xy+4y^2 -16x^2 +24xy -9y^2
-7x^2+12xy-5y^2