calculus

write the expression in the form bi, where b is the real number

squareroot-16

squareroot-25

squareroot-3

squareroot-5

  1. 0
asked by tommy
  1. what is 4i squared? 5i?

    posted by bobpursley
  2. √-16
    = √-1√16
    = 4i

    now you do the others the same way.

    posted by Reiny
  3. sqrt(-16)=sqrt(-1)sqrt(16)=i sqrt(16)=4i
    sqrt(-25)=sqrt(-1)sqrt(25)=i sqrt(25)=5i

    I think you can see it now. Just remember i=sqrt(-1). And don't forget your properties of sq-roots.

    posted by Collin

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of
  2. Algebra

    I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of
  3. math

    find the standard form of the complex number shown below 9(cos 11pi/6 + isin 11pi/6) a. 2/9 - 2(squareroot)3/9 i b. -4(squareroot)3/9 + 4/9 i c. 9/2 - 9(squareroot)3/2 i d. 9(squareroot)3/2 - 9/2 i e. -9(squareroot)3/4 - 9/4 i
  4. math 11 review

    A couple of extra practice questions I can't remember how to do. Can anyone help? 1. "2*squareroot*5(3*squareroot*7 + 8*squareroot*12)" I simplified down to 6*squareroot*35 + 2*squareroot*15, but now I am stuck! 2. "The sum of a
  5. algebra

    ^5 squareroot of x^20 *my answer x^4 ^3 squareroot of 729/343 my answer: couldn't figure it out use rational exponents to write ^3 squareroot of x * ^5 squareroot of 4x my answer: ^15 squareroot 4x^8
  6. Algebra

    I am not too sure about this problem. Can you please help me? Graph the ellipse and locate the foci. 9x^2=144-16y^2 I got (- squareroot 7, 0) and (squareroot 7,0), but I was looking at one problem in one book similar to it, and it
  7. math homework

    find a unit vector in the direction of u u = (-5, -12, 9) a. (-5, -12, 9) b. 1 / squareroot 26 (-5, -12, 9) c. squareroot 26 (-5, -12, 9 d. 1/ 5 squareroot 10 (-5, -12, 9) e. 1/ 5 squareroot 10 (5, 12, -9)
  8. math

    Classify each statement as sometimes, always, or never true. A. 2^(2/3)*4^(4/3)=8*2^(1/3) B. If x>0, then (squareroot x*squareroot 2)^3 =x^(3/2) 2^(3/2) C. If x>0, then (squareroot x+ squareroot 2)^3 =x^(3/2) 2^(3/2) D. The only
  9. Algebra

    I have a few questions that I am not too sure about, could you please check them. Thanks! 1. Find the union {2,3} U {2,4,8} This is what I got : {2,4,8,3} 2. State the name of the property illustrated: (6+3) +(1+16)=(1+16)+(6+3) I
  10. Geometry

    Determine whether the triple of numbers can be the sides of a right triangle. Please explain. 6, 8, 10 Squareroot of 2, Squareroot of 3, Squareroot of 10

More Similar Questions