SOLUTION: x(x+3)= 18

Question 294621: x(x+3)= 18
Answer by Monkibat(7) (Show Source): You can put this solution on YOUR website!
First distribute the x to (x+3). , x times x = and x times 3 = 3x. Now we have . Now set the equation to zero by subtracting both sides by 18. Now we have the equation: . Now we can factor the equation. We have to find factors of -18 that add to +3. Positive 6 and negative 3 are factors that work. factors to . Now set each equation to zero and solve. , subtract 6 from both sides, . Now , add 3 to both sides, . The answers are and . We're not done, we have to check to make sure both solutions work. Plug -6 into the original equation , ==. Therefore works and is one of your answers, now we have to check by plugging 3 into the original equation. ==. Therefore works and is one of the solutions too. -6 and 3 are you answers.
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