Question

Which is right? plz help and NO LINKS

Answer 1

C. x=-10 and x=3

Explanation:

This equation can be solved through factoring. However, there is one step that must happen first.

First, subtract 30 from both sides

• 
  `x^2+7x-30=0`

Then, factor using the knowledge that the 2 factors will add to 7 and multiply to -30.

• 
  `(x+10)(x-3)=0`

Next, using the zero product property, set each expression to zero.

• x+10=0

• x-3=0

Finally, solve each of these equations for x.

• x=-10

• x=3