State whether True or False.
Simplify: $(4 x - 5 y) (5 x - 4 y)$ .
The answer is $20 x^{2} - 41 x y + 20 y^{2}$ .

True

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False

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Solution

The correct option is A True
Multiplying $(4 x - 5 y) (5 x - 4 y)$ gives

$= 4 x (5 x - 4 y) - 5 y (5 x - 4 y)$

$= 20 x^{2} - 16 x y - 25 x y + 20 y^{2}$

$= 20 x^{2} - 41 x y + 20 y^{2}$

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