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P=a×b
a=2x
b=?
P=a×b /:a
b=P:a
b=(6xy+8x²):2x
b=3y+4x
O=2x×2+(3y+4x)×2
O=4x+6y+8x
O=12x+6y
a= 2x
b=?
P=ab
6xy+8x²=2x * b/:2x
b= 3y +4x
Ob=2a+2b
Ob= 2*2x+2*(3y+4x)=4x+6y+8x=12x+6y