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2.(x+4)(x+15) = x²+15x+4x+60=x²+19x+60
3(2y-5)(2y+3) = 4y²+6y-10y-15=4y²-4y-15
2.x²+15x+4x+60=x²+19x+60
3.4y²+6y-10y-15=4y²-4y-15