In this week, I learned about the zero product law.
This is because we spent long time about this topic.
We tried to solve many question to follow this one.
If the product of multiple factors is equal to zero, at least one of the factors must be equal to zero. This mean is if A multiple B =0, then A =0 or B=0.
Try to solve example. 8x=0 can change x=0 divide 8. So, x must be 0 in this time.
When solving a quadratic equation, correct the equation to equal 0 and then calculate. Boxes and groups should be used when calculating.
I tried to solve page 137 question 2 number E to use these way.
At first, I tried to use box and got two group.
After that, I calculated each x.
In this time, don`t forget these group sum is 0.