Question 135235
Find the product:
(x - 4y)( 5x - 9y) 
Use FOIL:
F: x*5x = 5x^2
O: x*-9y = -9xy
I: 5x*-4y= -20xy
L: -4y*-9y = 36y^2
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Add these up to get:
5x^2-29xy+36y^2
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Cheers,
Stan H.