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Are the expressions A = m(2−m) and B = m(-m+2) algebraically equivalent?

Mathematics

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Here are the solutions to the questions:

1.1.1 Substitute m=1m=1 in A and B respectively.

  1. Substitute m=1m=1 into expression A.

    A=m(2−m)=1(2−1)=1(1)=1A = m(2-m) = 1(2-1) = 1(1) = 1
  2. Substitute m=1m=1 into expression B.

    B=m(−m+2)=1(−1+2)=1(1)=1B = m(-m+2) = 1(-1+2) = 1(1) = 1

    Do you get the same answer?
    Yes

    Conclusion:
    The expressions A and B yield the same value when m=1m=1.

    1.1.2 Choose another value for mm, and substitute in A and B. Do you get the same answer?

  3. Choose m=3m=3.

    Substitute m=3m=3 into expression A.

    A=m(2−m)=3(2−3)=3(−1)=−3A = m(2-m) = 3(2-3) = 3(-1) = -3
  4. Substitute m=3m=3 into expression B.

    B=m(−m+2)=3(−3+2)=3(−1)=−3B = m(-m+2) = 3(-3+2) = 3(-1) = -3

    Do you get the same answer?
    Yes

    Conclusion:
    The expressions A and B yield the same value when m=3m=3.

    1.1.3 Multiply out expression A.

  5. Apply the distributive property to expression A.

    A=m(2−m)=m⋅2−m⋅m=2m−m2A = m(2-m) = m \cdot 2 - m \cdot m = 2m - m^2

    The multiplied-out expression A is 2m−m2\boxed{2m - m^2}.

    1.1.4 Multiply out expression B.

  6. Apply the distributive property to expression B.

    B=m(−m+2)=m⋅(−m)+m⋅2=−m2+2mB = m(-m+2) = m \cdot (-m) + m \cdot 2 = -m^2 + 2m

    The multiplied-out expression B is −m2+2m\boxed{-m^2 + 2m}.

    1.1.5 Are the multiplied-out expressions the same? Explain.

    Are the multiplied-out expressions the same?
    Yes

    Explain:
    The multiplied-out expressions 2m−m22m - m^2 and −m2+2m-m^2 + 2m are the same. This is because the order of terms in an addition or subtraction does not change the value of the expression (commutative property of addition). 2m−m22m - m^2 can be rewritten as −m2+2m-m^2 + 2m.

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