1 ) 3yx - 6xy2
= 3xy ( 1 - 2y )
2 ) 5ab2 - 20a3b2
= 5ab2 ( 1 - 4a2 )
= 5ab2 ( 1 - 2a ) ( 1 + 2a )
3 ) 3x - 3b - y ( b - x )
= 3 ( x - b ) + y ( x - b )
= ( x - b ) ( 3 + y )
1)3xy-6xy2=3xy(1-2y)
2)5ab2-20a3b2=5ab2(1-4a2)=5ab2[12-(2a)2]=5ab2(1+2a)(1-2a)
3)3x-3b-y(b-x)=3x-3b-by+xy=(3x+xy)-(3b+by)=3x(1+y)-3b(1+y)=3(1+y)(x-b)
\(3xy-6\left(xy\right)^2=3xy.\left(1-2xy\right)\)
\(5\left(ab\right)^2-20a^3b^2=5a^2b^2\left(1-4a\right)\)
\(3x-3b-y\left(b-x\right)=3.\left(x-b\right)+y.\left(x-b\right)=\left(x-b\right)\left(3+y\right)\)
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