I was about to respond to you about correcting him and then realized that it was you correcting yourself. I now know how people don't notice that it's sometimes one person arguing with themselves in threads.
i graduated high school **** ass and every math class i took i was to the understanding that when a variable was there it meant they were the same number
A function like this forms a parabola when graphed and crosses the x-axis twice unless b^2-(4ac) is a number less than 0 in which case the parabola does not cross the x-axis at all. The two answers are the values for x where y is equal to 0
No because x is the answer and there are 2 different answers in this problem. When a binomial equals zero you have to solve for each side of the binomial. When you do this you plug each one back into the original equation. Which ever one when plugged in is right, that is the answer. In this case, when both are plugged in they are both correct. Its basic Algebra. You'll learn it in middle school or high school depending on how smart you are
Yeah and to get it to equal zero you subtract the 175 to get it on the other side. Then everything equals zero, you turn it into a binomial and then you solve for each
yes, but it was obviously factorable (im a math major and algebra TA) so you don't need to use it. But if you do use it then yes you will get the same answers.
well thank u for ur very helpful words of wisdom, it seems iv been out of school alittle too long. seeing as i wish to be an engineer of sorts im deffenetly going to need to be able to do this rather simple math.
You did it a much more complicated way. Its easier to do this
x^2+3x-5=175
-175 -175
x^2+3x-180=0
(x-12)(x+15)=0 Then you turn it into a binomial
Then you solve each one separately so you get x=12 and x=-15
same thing, just more steps to not confuse anyone looking for the in betweens.
i like to do it in my head better. writing it down is a working man's job. laziness rules