Current location - Training Enrollment Network - Mathematics courses - The learning method is reported in the third issue of the ninth grade of Mathematics Weekly People's Education Edition.
The learning method is reported in the third issue of the ninth grade of Mathematics Weekly People's Education Edition.
22. 1 unary quadratic equation

Self-test:1.d2.d3.b.

4.x? +6x-280=0

5.2 times? +5x+3=0

6.50 times? -25x+3=0

Self-breakthrough: solution: from the meaning of the question, 3-a=2, 3b-4=2, a= 1, b=2, then ...

Is that so?