math

posted by .

Simplify and show:

2a-6(10a)-5a^2(2)
-----------------
(2a-6)^2

This is my work but its not right.

10a-10a^2
--------
2a-6

Then solve for a by setting numerator to zero. so I got this...

10a-10a^2=0
10a(1-a)=0
a=0, a=1

My book says a=0, or a=6 why didn't I get this?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. algabra

    the sum of a the digits in a two digit # is 11. if the digits are reversed, the new # is 45 more than the original #. What is this # !!! i need help AB is the two digit number A+B=11 10B + A= 10A + B - 45 solve. Ok, first. You would …
  2. math

    factor the expression: 10a^2-19a+7 ok I no how to start of which would be (10a- )(a+ ) but i don't no how to factor it from here
  3. Math/Algebra

    Could you also check these to. Thanks. (4x^2 + 9x - 1) - (5 - x^2) Answer: 5x^2+ 9x - 6 (8 + 7a + 10a^2) - (a^2 - 3a - 2) Answer: 10 + 10a + 9a^2
  4. Algebra II

    Does the square root of ((a^2)-(10a)+(25))simplify to a+5 times the square root of -10a ?
  5. algebra

    simplify show all work -6a-4a^2-2(10a^2+3a) evaluate -10+x divide by 2(9-x^2) for x=-6
  6. math

    What is the simplest form of the expression below?
  7. Geometry

    Solve 10a - 5b = 25 for b. f) b = 10a + 25 g) b = 10a - 25 h) b = 2a +5 i) b = 2a - 5 What exactly are they asking me to do here?
  8. Geometry

    Solve 10a - 5b = 25 for b. f) b = 10a + 25 g) b = 10a - 25 h) b = 2a +5 i) b = 2a - 5 What exactly are they asking me to do here?
  9. Math

    Simplify. Please show all your work and explain. 6a^3b^2/10a^5b^4
  10. math

    LCM of 10a and 15a^2 Factors of 10a are 10,a,2,5 but the prime factors are 2,5,a Factors of 15a^2 are 15,a^2, 3,5,a,a Prime factors are 3,5,a,a Common between two are 5 and a So is the LCM of 10a and 15^2 5a?

More Similar Questions