algebra

posted by .

Given f(x) = 5x2 – 3x + 1, find f(–2).
so would this be 5(-2*-2) -3(-2)+1
answer being 15

not correct
(I assume looking at your substitution that the first term is 5x^2 or 5x²)

f(x) = 5x^2 – 3x + 1
f(-2) = 5(-2)^2 - 3(-2) + 1
=5(4) + 6 + 1
=27

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    I need help in finding the remainder when you divide 5x2 + 4x -40 by x-4.. (5x2 = 5x(2) I also need to know what is the completely factored form of 4x5 - 256x3 (4x5 = 4x(5) & 256x(3) I also need the solutions of the equation 1.5x2 …
  2. Math help please check

    Add or Subtract for #3-4 3. (2x2 + 6x + 1) + (–7x2 + 2x – 3) 5x2 – 4x – 2 –5x2 + 8x – 2 5x2 – 8x + 2 –9x2 – 8x + 2 4. (3x2 – 7x – 4) – (6x2 – 6x + 1) –3x2 – x –5 –3x2 –13x + 5 9x2 – x + 5 3x2 – …
  3. calculus

    Evaluate the following integrals using the given substitutions. (a) (3x^2 + 10x)dx/(x^3 + 5x^2 + 18 , substitution u = x3 + 5x2 + 18; (b)(14x + 4)cos(7x^2 + 4x)dx,substitution u = 7x^2 + 4x.
  4. algebra

    would this be correct -3squared + ( (5 (8-6) ) / 2 + 45 ) / 5 =9 + ((5x2)/2)+9 -9 + 5 + 9 =23
  5. algebra

    would this be correct -3squared + ( (5 (8-6) ) / 2 + 45 ) / 5 =9 + ((5x2)/2)+9 -9 + 5 + 9 =23
  6. Algebra

    From 7x2 – 4x subtract 5x2 + 2x. I do not understand what order to subtract. Do I subtract like a or b?
  7. Composition of Functions

    1. Find (f·g)(x) where f(x) = 1/x²+3 and g(x) = √x-2. a) (f·g)(x) = 1/x-2 b) (f·g)(x) = 1/√x-2 +3 c) (f·g)(x) = √-2x²-5/x²+3 2. Find (g·f)(x) where f(x) = x²-2 and g(x) = 5x-8. a) (g·f)(x) = 5x²-18 b) (g·f)(x) = 5x²-4 …
  8. precalculus

    can you check my answers? Find Pk + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) 7 + 13 + 19 + …+(6k + 1) 7 + 13 + 19
  9. can you check my answers precalculus

    can you check my answers? Find Pk + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) 7 + 13 + 19 + …+(6k + 1) 7 + 13 + 19
  10. precalculus

    Are my answers correct if not which are right?

More Similar Questions