Homework Help: math

Posted by Mohamed shiko on Monday, January 17, 2011 at 1:31pm.

what is the solution sets of the following
a) 2x^-7x-5
b)5y^-16y+3
c)10x^+5y-6
d)10x^-13x+4
e)12y^-11y-5
f)10c^-21c+9
g)3m^+5m-2

math - Reiny, Monday, January 17, 2011 at 1:43pm
Are these equations equal to zero?

If so, then I noticed that each one factors quite easily.
I will do the last one

g)
3m^2 + 5m - 2 =0
(3m - 1)(m + 2) = 0
3m-1 = 0 or m+2 = 0
m = 1/3 or m = -2

do the others the same way.

You can check your answers by subbing them back in.
e.g. if m = -2
LS = 3(4) + 5(-2) - 2
= 12 - 10 - 2
= 0
= RS
so my answer of m=-2 is correct
math - helper, Monday, January 17, 2011 at 1:47pm
you are missing the exponents
if (a) should be 2x^2 - 7x - 5
a) 2x^2 - 7x - 5
does not factor, solve by using the quadratic formula or completing the square

if you are stuck, post your work and someone will help

tutors do not do your homework
Algebra 2 - Emily, Sunday, January 8, 2012 at 10:54pm
Complete the square to solve -x^2-7x+6=-2x^2

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