This week in Pre-Calculus 11 we started doing quadratic equations. A quadratic equation is an equation that has a degree of 2. When a quadratic equation equals 0, your final answer has to be x= and whatever number would make x=0.
This is a simple question, it is already in its factored form. I can easily see that for x to equal 0 in the first bracket it must be -5. And same with the second it must be -8, nothing else would work.
Sometimes they will give you an equation that doesn’t equal 0. In that case you would need to move that number to the other side of the equation and make it equal 0. When you do this the sign on the number changes.
Step 1: The first step is to move 27 to the other side of the equation making it -27 and the equation = 0.
Step 2: Now, we need to factor this equation and get it into two brackets. This is a simple 3-term factoring, the third part in factoring 1-2-3.
Step 3: The final step is to write out what would make the brackets equal to 0. So by factoring this we have got it down to the simple question we saw in the first equation.
That is all you have to do! Just remember to always make your equation equal to 0.
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