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rayray21

  • 4 years ago

Find the product: (5x-4y)^2

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  1. saifoo.khan
    • 4 years ago
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    (5x-4y)(5x-4y) FOIL

  2. fiddlearound
    • 4 years ago
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    or (a-b)^2=a^2-2ab+b^2

  3. rayray21
    • 4 years ago
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    so the answer is 25x^2+16y^2

  4. saifoo.khan
    • 4 years ago
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    25 x^2-40 x y+16 y^2

  5. smartass
    • 4 years ago
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    (5x)(5x)= 25x^2 (5x)(-4y)= -20xy (-4y)(-4y)=16y^2 (-4y)(5x)=-20xy 25x^2-40xy+16y^2

  6. starfish33
    • 4 years ago
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    25x^2-40xy+16y^2

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