Posted by Jenny on Wednesday, May 8, 2013 at 9:53pm.
So the questions was>Factor the following algebraic equation and describe the process by which it is done: x²+ 3x – 10 = ?
I solved the questions correctly but my teacher said I need to show it algebraically not arithmetically. & she said that I need to show how I arrived with the factors (x+5)(x2) = ?

Math  Sunny, Wednesday, May 8, 2013 at 9:58pm
factors of 10
(10,1,2,5)
since you get 52 = 3...you would use 5,2
(x +5)*(x2) = foil
x^2 +(2x)+5x10 =
x^2 + 3x  10

Math  Sheryl, Wednesday, May 8, 2013 at 9:58pm
Make a list of factors for both the coefficient of the x^2 term and the constant. In this case, 1 and 10. so 1X1 and then 1X10 and 2X5. Also, the fact that the constant is a negative 10, that means one of the 2 binomials
must be negative. Then you look for the combination of the sets of factors that when put together with FOIL, you get the middle term, in this case, 3x.

Math  Jenny, Wednesday, May 8, 2013 at 10:35pm
Thank you both!!
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