Summarize all the math formulas in high school, thanks

Hello, the reason why this formula came out is that it is opened from the right view of Baoping, that is, he does not push from left to right, and from right to left.

If you want to use this formula, push from left to right, then the best way is to practice more, and then memorize his form, not how did you push it out in the exam room? It's with your experience, your proficiency to make it, give an example, when you see that the left is one by one, one by one, first observe whether this constant can be perfectly squared? For example, 1 4 in this problem can be completely squared, she opens the root number, the result is 1 2, if your field is a mountain, then you can't open a big one, or say that the number is backing the mountain, and then it may be more troublesome, of course, you can also do it, so our first step is to get this root number to two, observe whether its absolute value is equal to 1 4, 12 2 2 is just equal to one, 1 2 2 is just equal to one, one is the absolute value of the first term coefficient, so with this experience, we can see it directly, the left try can be completely squared, and then according to the analysis we just made, directly use the number 1 2 after subtracting the root number of the constant term, so the left and right can be matched out to be a-1 2, which is actually done by experience, and you can practice more proficiently.

Yes, with the method.

The figure below is the sum of squares formula, squared difference formula.

The perfect square formula for junior high school.

a±b）²=a²±2ab+b²

For example, if you want to calculate a quadratic equation ax 2+bx+c=0, and decompose c a into the product of two numbers (assuming m and n), so that the sum of these two numbers (m+n) is b a.

In your equation, decompose 1 4 into the product of two numbers, so that the sum of these two numbers is exactly equal to 1

a-b）²=a²-2ab+b²

Replace one-half with b.

Perfect square formula formula: first square and tail squared, twice the product in **.

This is a perfectly squared formula.

This is far from the level of skill, you will understand it after seeing it two or three times, and it is just a complete square formula.

1.This is the perfect square formula: (a-b) = a -2ab+b 2The question you are asking:

a²-a+1/4

a²-（2×a×（1/2））＋1/2）²

a-（1/2））²

So let's use the perfect square formula.