Solve X^2 + x -30
X -5

Question

Solve  X^2 + x -30
                X -5

anonymous · Answer

x=-5?
-5^2-5-30
25-5-20=
20-30=-10

anonymous · Answer

Thanks!!(:

compassionate · Answer

Hi, 

This is a trinomial because it has three terms. A trinomial can  be simplified into a binomial. A binomial akes the form (x -+ y)(x -+ z) 

You want to start off by solving what you know! You know that the first term MUST be x to the second power. So, that's a good place to start! $$(x \pm ?)(x \pm ?) $$

You are given the expression: $$ x^2 + x -30       $$

When added together, what will produce x and when multiplied produce -30? Did you say 6 and -5? Correct! So we have: $$(x + 6)(x - 5)$$Now, al that is being divded by x-5. So lets plug those numbers in: $$\frac{ (x + 6)(x - 5) }{ x-5 }$$x-5 and x-5 cancel out! Leaving you with x + 6! 



OpenStudy Ambassador: Compassionate

anonymous · Answer

thanks!(: