Algebra 1
posted by mike .
Are these right?
xy  3x  8y + 24
(3xy)(8y+24)
8y+24
4x^2 + 20x + 5y +xy
36x+(5y+x)
36x5y
I don't think so it's right.Your question xy3x8y+24 is itself the answer.It cannot be further calculated bcause it doesn't have the terms containing the same variables.
If you are factoring then no. Using the commutative and associative properties I can rewrite the equation:
xy  3x  8y +24
xy 8y 3x +24
y(x8) 3(x8) factor by grouping
(x8)(y3) factor out the (x8)
Sorry forgot to answer the second one for you. You use the same techniques.
4x^2+20x+5y+xy
4x^2+20x+xy+5y
4x(x+5)+y(x+y)
(x+5)(4x+y)
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