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Lady_Fox [76]
3 years ago
15

Which of the following is the correct expansion of (3x-y)2

Mathematics
1 answer:
Studentka2010 [4]3 years ago
3 0

\bold{[ \ Answer \ ]}

\boxed{\bold{9x^{2} \ - \ 6xy \ + y^{2} }}

\bold{[ \ Explanation \ ]}

  • \bold{Find \ Expansion: \ (3x \ - \ y^{2} )}

\bold{----------------------}

  • \bold{[Apply \ Perfect \ Square \ Formula\ (\left(a-b\right)^2=a^2-2ab+b^2)] \ a \ = \ 3x, \ b \ = \ y}

\bold{\left(3x\right)^2-2\cdot \:3xy+y^2}

  • \bold{[Simplify \ \left(3x\right)^2-2\cdot \:3xy+y^2] \ 9x^2-6xy+y^2}

= \bold{9x^2-6xy+y^2}

\boxed{\bold{[] \ Eclipsed \ []}}

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Answer:

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Step-by-step explanation:

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from the general form of the equation:

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3 years ago
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Katarina [22]

Answer:

(-∞, -12), (2, ∞)

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     -15    -15         -15     -15

------------------   -------------------

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÷3  ÷3               ÷3     ÷3

------------         ------------------

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or

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I hope this helps!

4 0
1 year ago
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