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# Maths Help!!

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1. How do I factorise:
a) 2x^4+14x^2+24
b)2x^2-50
c)6x^2-10x+4
d)15x^2+42x-9
2. (Original post by thea_)
How do I factorise:
a) 2x^4+14x^2+24
b)2x^2-50
c)6x^2-10x+4
d)15x^2+42x-9
Well I don't feel like doing your homework for you but I can point you in the right direction:

a) Factor out a 2 and let , replace the x's with X appropriately. Factorise it in terms of X before going back to x's.
b) Factor out a 2. Use difference of two squares whereby (useful to remember this)
c) You can just factor out the 6 then looks for fractions to make up the constant and coefficient of x. Unless you want to use a different method. Personally I like to use this method: https://www.youtube.com/watch?v=r1JAJfmRG5w but I'd recommend factoring out the greatest common factor out of all the coefficients before proceeding with it.
d) Proceed with the same idea as above.

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Updated: September 13, 2016
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