SOLUTION: Solve. Write the solution set using interval notation.
x^2 + 3x > 40
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Question 1058964: Solve. Write the solution set using interval notation.
x^2 + 3x > 40
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The roots are the critical values.
If you recognize that the quadratic is a parabolic function then you may know enough that this has vertex minimum and opens upward, since lead coefficient is positive.
Should be clear - solution not between the roots.
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
The solution is this set:
x < -8 OR x > 5.
In the interval notation, the solution set is (,) U (,).
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