Multiply (2x + 5y) (3x + 4y) - (7x + 3y)(2x + 4)
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Step-by-step explanation:
(2x+5y) (3x+4y) - (7x+3y) (2x+4)
={2x(3x+4y) + 5y(3x+4y)} - {7x(2x+4)+3y(2x+4)}
={6x^2+8xy+15xy+20y^2} - {14x^2+12x+6xy+12y}
=6x^2+23xy+20y^2-14x^2-12x-6xy-12y
= -8x^2+17xy+20y^2-12x-12y (answer)
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