Solve. Simplify your answer. Type an exact answer using radicals as needed.
y^2 + 31 = 12y
y = {8.236067978, 3.763932022}
1. y =(12-√20)/2=6-√ 5 = 3.764
2. y =(12+√20)/2=6+√ 5 = 8.236
Which would be the correct way to answer this equation, the first set, or the numbered set or is this the wrong answer altogether?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. y^2 - 12y + 31 = 0
    clearly , it does not factor, so let's use the formula
    y = (12 ± √20)/2
    = (12 ± 2√5)/2
    = 6 ± √5

    So what do you think?

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. pre algebra

    Use the Pythagorean theorem to find the unknown side of the right triangle. 7 24 A right triangle has a vertical side of length 7, a horizontal side of length 24, and an unlabeled hypotenuse. Hypotenuse length nothing ​(Simplify

  2. Algebra

    you are about to take a test that contain questions of type A worth 4 points and of type B worth 7 points. You must answer at least 5 of type A and 3 of type B, but time restricts answering more than 10 of either type. In total,

  3. ela

    1The exact definition of a word is its ________ meaning. Answer literal 2Use the sentence to answer the question. The pond was so still that it looked like a silvery mirror under the moonlit sky. Which type of figurative language

  4. maths

    The rectangular coordinates of a point are given (-5,-5root3). Find polar coordinates of the point. Express theta in radians. Answer must be in form ​(Type an ordered pair. Type an exact answer in terms of pi.Use integers or

  1. Algebra

    1) Simplify: (Y^4) (y^3) A:y^1 B:y^7 (my answer) C:y^12 D:y^43 2)Simplify: Y^6 / y^2 A: y^8 B: y^4 C: y^3 ( my answer) D: y^1 3: Convert into a fraction 5-^3 A: 1/5 B:1/15 (my answer) C:1/25 D:1/125 4: 15^0=? A:0 (my answer) B:1

  2. algebra

    1)Simplify:(6x^3-16x^2+11x-5)/(3x-2) answer= 2x^2-4x+1-3over3x-2 2)Factor 27x^3-1 completley. answer= (3x-1)^3 if this isnt correct,im not sure how to solve it b/c this makes the most sense to me. 3)Simplify: x^2-3x-28 over

  3. Algebra

    1) translate to an algebraic expression: one less than a product of two numbers A: xy-1 2) 12/25 = ? A: ? = .48 3) Find -x when x= -25/41 (this is a fraction) A: -x = 41/25 4) Use a commutative law to find an equivalent

  4. math

    Simplify the radical expression completely. DO NOT change to a decimal, give an exact answer. √ 72x^3y^8 / 2x^13y^ 5 Simplify the radical expression completely. DO NOT change to a decimal, give an exact answer. Show your work.

  1. Math

    First Estimate the answer. Then find the exact answer. Simplify your answer if possible. 9*2/7*8/5/7

  2. Algebra II

    1)Find the exact value of sin 165 degrees. Answer: (sqrt6 + sqrt2)/4 2) Simplify: (4m/5n^2)- (n/2m) Answer: (8m^2-5n^3)/10n^2m Thanks

  3. Trigonometry

    Find the exact value of tan(a-b) sin a = 4/5, -3pi/2

  4. Pre-Calculus

    The exponential function y(x)=Ce^ax satisfies the conditions y(0)=6 and y(1)=7. (a) Find the constants C and a. Enter the exact value of a. (b) Find y(2). Enter the exact answer. Simplify the answer so it does not contain any

View more similar questions or ask a new question.