Question

Solve: x2 + 3x = 28
{-7, 4}
{-4, 7}
{-7, -4}
{7, 4}

Answer 1

Get the equation to one side with 0 on the other

Answer 2

which is
\[x^2 + 3x -28 = 0\]

Answer 3

look at the factors of -28 that would add to 3

that will help you get the solution

Answer 4

Yes, and also look at the signs

Answer 5

The +3x indicates that the higher number is positive and then the -28 shows that two numbers on the end have to have one as negative and one as positive.

Answer 6

That should be enough to get you to your answers

Answer 7

thank you !