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What is the value of x in the following equation x=-2 x=3 x=7 x=-7 |
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Answer» Answer: When you factor a quadratic equation, you end up with two factors. For example...
x2 + 5x + 6 = 0 (X + 3)(x + 2) = 0
Now, this part gets CONFUSING, but if you have two factors that equal 0 when multiplied, one or both factors has to equal 0.
x + 3 = 0 x = -3
x + 2 = 0 x = -2
So, you have two solutions. Plug in either -2 or -3 in for x and your equation will be true. Both solutions came from the factors of your When you factor a quadratic equation, you end up with two factors. For example...
x2 + 5x + 6 = 0 (x + 3)(x + 2) = 0 Rearrange: Rearrange the equation by subtracting what is to the right of the equal SIGN from both sides of the equation : x-(-3)=0 Step by step solution : STEP 1 : Solving a Single Variable Equation: 1.1 Solve : x+3 = 0 Subtract 3 from both sides of the equation : x = -3 |
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