Hi Stacy;
9x^{2} + 12xy + c
I think this is...
9x^{2} + 12x + c........There is no y...
For the FOIL...
FIRST...(3x)(3x)=9x^{2}
OUTER and INNER must addup to 12x. Because the coefficient of each x is 3, and because there are 2 parenthetical equations, and because the second number of the parenthetical equation must duplicate, we can calculate this second number of the parenthetical equations by (3)(2)(?)=12....?=2.
(3x+2)^{2}
(3x+2)(3x+2)
Let's FOIL...
FIRST...(3x)(3x)=9x^{2}
OUTER...(3x)(2)=6x
INNER...(2)(3x)=6x
LAST...(2)(2)=4
9x^{2}+6x+6x+4
9x^{2}+12x+4
c=4
1/22/2014

Vivian L.
Comments