x？ -5x+6=4

Ask for x? -4x？ -3x+2 value?

In that case.

Solution: Because of X? -5x+6=4

Obviously, x≠0 x? -5x+2=0

So both sides of the formula are multiplied by X.

x？ -Five times? +2x=0

So x? -4x？ -3x=x？ -5x (put 5x on it? And 2x).

So x? -4x？ -3x+2=x？ -5x+2=0

Get the result x? -4x？ -3x+2 equals 0.

Answer over

Experience: For example, the second kind of questions is students' observation ability, and the second kind is the collocation method you mentioned.

Of course, if you encounter similar problems in the future, you may wish to deform in the direction of the formula that will get the final result.

When you change the formula, you will find that the topic is simple and clear at a glance.

If it is convenient, please adopt it by the way. Thank you.