Algebra II

posted by Jon

Assume that no denomenator equals 0.

(7x^2+3x-9)-(-x^2+8x-3)

= 7x^2+3x-9+x^2-8x+3
= (7x^2+x^2)+(3x-8x)+(-9+3)
= 8x^2+-5x+-6
= 8x^2-5x-6(answer)

  1. Dan

    What exactly is your question? I don't even see a denominator anywhere :)

    What you have is right so far. If you want to finish that question you need to use the quadratic formula

    x = (-b +/- square root(b^2 - 4ac)) / 2a

    x = (5 +/- square root (25 + 192)) / 16

    x = (5 +/- square root (217)) / 16

    which yields x1 = 1.23 and x2 = -0.61

  2. Jon

    (7x^2+3x-9)-(-x^2+8x-3) is the question. the rest is my work

  3. Dan

    Your solution is perfect, did you just want confirmation?

  4. Jon

    yes

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Pre-Algebra

    If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule?
  2. Pre-Algebra

    If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule?
  3. Algebra II (check)

    Assume that no denominator equals 0. 5x^3(7x)^2 = 5*7*7+x^3+x^2 = 245x^5(answer)
  4. Algebra II (check)

    Assume that no denominator equals 0. (2x-3)^2 = 2x * 2x -3 * -3 = 4x-9(answer)
  5. Algebra II (check)

    Assume that no denominator equals 0. sqrt 16x^2y^4 = sqrt (4x)y^2 = 4xy^2(answer)
  6. Algebra II (check)

    Assume that no denominator equals 0. 2+i/1-3i = 2+i/1-3i = (2+i/1-3i) * (1+3i/1+3i) = (2+3i^2)/(1-9i^2) = (2/1) - (1/3i) = 2-1/3i(answer)
  7. algebra ll

    solve the system of equation. 4x - 3y equals 14 y equals -3x plus 4 and another following up 4x - 3 equals 8 2x plus 5y equals 9 thatnk u for the help
  8. algebra ll

    if f(x)equals 5x^2 minus 4/x, find f(4) my ans. is f(4) equals 66 if wrong answer and show work please
  9. algebra

    Could someone show me how to solve this joint variation problems?
  10. Math

    Hi ya! So I got a question like when I'm rationalzing a denomenator in order to get simple radical form I really don't know what to do for example this problem (6^(2^-1)-3^(2^-1))^-1 ok so I know your trying to get it so it's a perfect …

More Similar Questions