Algebra II

posted by .

The answer for (7+5i)+(-4+2i) is 3+7i. But I got -38-6i. I combined -28 and 10i^2 to get -38, and I combined -20i and 14i to get -6il So all together this was -28+-6i+-10, which resulted in -38-6i. Could you please tell me where I went wrong?

  • Algebra II -

    (7+5i)+(-4+2i)
    The answer is for an addition.
    You did a multiplication. Hope that explains it.

  • Algebra II -

    (7+5i) + (-4+2i)=> 7+5i-4+2i :.
    7-4+5i+2i = 3 + 7i

  • Algebra II -

    Exactly! :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physical science

    can two or more elements be combined chemically to make a new element?
  2. Math

    Express in the form, a + bi: (-11 + 4i) + (6 + 8i) Answer a. -5 + 12i b. 5 - 12i c. -3 + 10i d. -7 + 14i
  3. Algebra

    Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right?
  4. physics

    two unknown resistors a and b are connected together. when they are connected in series their combined resistance is 15 ohm. When they are connected in parallel, their combined resistance is 3.3 ohm. What are the resistances of A and …
  5. science physics

    When all forces acting on an object are combined together, what's the result known as
  6. Algebra

    Determine whether the equation represents direct, inverse,joint,or combined variation. y=31x/wz If it is combined, please explain to me.
  7. math

    The combined capacity of a bottle and a glass is equal to the capacity of a pitcher. The capacity of a bottle is equal to the combined capacity of a glass and a mug. The combined capacity of three mugs is equal to the combined capacity …
  8. Precalculus

    Combined area of 1680ft^2 for 4 identical rectangular corrals. Corrals are joined together and no fencing at the back wall of the barn. 200=5d+4w 1680=4dw What length will produce the maximum area?
  9. Precalculus

    I have a diagram that has 4 rectangular corrals joined together and a barn above it. Fencing is not needed along the back wall of the barn. The perimeter is 200 ft and the question asks... If each corral is 16 ft. long (front to back) …
  10. Chemistry Combined Gas Law

    Hi so im reviewing or our long test tomorrow on combined gas law and gay lussac's well here, combined gas law i find it (maybe ) confusing to do this one, because theres no right answers because it is a practice exercise.. what i know …

More Similar Questions