math

posted by .

factorise

1. 3a^2 - 2a - 8

2. 3x^2 + 31 + 10

3. 64y^2 - 49

please help

thankyou

  • math -

    well, 6 and 4 differ by 2
    so
    (3a+4)(a-2)

    I need 30 and 1 so
    (3x+1)(x+10)

    difference of 2 squares
    a^2-b^2 = (a-b)(a+b)
    here a = 8y and b = 7

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. factorising

    how do you factorise? for example putting 2x² + x - 3 into the form (2x + 3)(x - 1) factorise 9x to the power of 4 - 64y to the power of 2
  2. math

    clasifying conics 4xsquared=64-64ysquared 4x^2 = 64 - 64y^2 4x^2 + 64y^2 = 64 .......divide each term by 64 (x^2)/16 + y^2 = 1 you should recognize the standard form of the equation of an ellipse.
  3. Math

    9x^2+16y^2-18x+64y-71=0 find the coordinates of the center, the foci, and the vertices of this ellipse. 9x^2+16y^2-18x+64y-71=0 9x^2-18x+16y^2+64y=71 9(x^2-2x)+16(y^2+4y)=71 9(x^2-2x+1)+16(y^2+4y+4)=71
  4. POLYNOMIALS

    I'm really sorry, i'm preparing for O levels, so i have a lot of maths questions to ask... please excuse me... Question: Find the value of k for which a-3b is a factor of a^4 - 7a^2b^2 + kb^4. Hence, factorise completely. How do i …
  5. math

    how would you factorise a) 9x^2 - 49 b) 9x^2 - 121 c) 49x^2 - 25x^2 thankyou
  6. drwls history

    please could i say a huge thankyou you have helped me alot and i appreciate it thankyou again you are a star! :]
  7. Maths

    How to do factorise ? What is Factorise ?
  8. Language art

    Just this one question please . 1.According to the MLA style, how should you format the title of a magazine article?
  9. factorise fully

    125x^3 - 64y^3
  10. Maths

    Fully factorise X^3-4x^2+x-6 I got (x+3) as a factor but I'm not sure what the other two factors are. Please help Thankyou

More Similar Questions