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Suppose x + y = 6 and xy = 4. Find the value of x² y + xy² without solving the equations.

Sagot :

x+y=6
xy=4
x^2+xy^2
first take out the common factors from the equation
so..
xy(x+y)
then substitute the numbers corresponding with the terms given
so..
4(6)
then multiply
24

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