Can someone explain step by step how to do these two questions please. FACTORING
a) 2x^2-15+7

Question

Can someone explain step by step how to do these two questions please. FACTORING 
a) 2x^2-15+7

anonymous · Answer

What are you trying to figure out here? Simplifying?

anonymous · Answer

no factoring

anonymous · Answer

does the 15 have an x with it?

anonymous · Answer

I assume it does. In that case you ask yourself what number times what number equals 7, but when those 2 numbers are added together equal -15? However, in order for you to even get the 2x^2-15x+7 you know you must FOIL 2 equations, so with this in mind you have to make up for the 2x^2, thus your 2 equations have to be..
(2x       )  (x         )
Now you have to figure out the signs needed.. So you know these 2 numbers have to add up to -15 but multiply to +7, thus both numbers have to be negative.. Thus..
(2x - ?) (x - ?)
Now you just need to solve for the ? so what 2 numbers multiply to 7 but add to 15? well there is only one factor for 7 which is 7x1, but the choice comes okay where do you put the 7 and where do you put the 1? 
I think you can figure it out from here...
After you figure out where the 7 and 1 go, take each equation and set em = to 0 then solve for x and you will get 2 numbers for x.