Can someone please help me with these two questions? http://gyazo.com/1d004fa7cfbcc2cdea8c3a916bac02bb http://gyazo.com/76ee41f7593de1ac5bd097c8e19a4d90
I can't help sorry dude.
In learning to factor quadratic trinomials by grouping, the first step I learned was to find two numbers that multiplied to (a*c) and added to (b). If m and n are the two numbers that add to b, then which of the options is the product of m and n? @Jakemalhas
Consider the trinomial 2x^2 + 9x − 5. a = +2, b = +9, and c = -5. It is an example of the type problem about which the question asks. In this case, we would look for two numbers, m and n, that multiply to -10 and add to +9. 2x^2 + 9x − 5 = 2x^2 + 10x + (-1)x + (-5) Compare that to the posed problem where a*c <0 and b >0. m*n <0 and m+n>0 From above, 10x + (-1)x Option C or Option D --> Which one? @