Overview: 2 questions will be solved this time.Among them
☆1 inequalities
☆1 equations
[ 1/2 Equation]
Work: Find the solution of equation 2X^2-5X-25 = 0 .
Question type: Equation
Solution:
After the equation is converted into a general formula, it is converted into:
( 2X + 5 )( X - 5 )=0
From
2X + 5 = 0
X - 5 = 0
it is concluded that::
There are 2 solution(s).
解一元二次方程的详细方法请参阅:《一元二次方程的解法》[ 2/2Inequality]
Assignment:Find the solution set of inequality X >= 0,X = 0 .
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
X >= 0 , X 0 (1)
From inequality(1):
X ≥ 0
The final solution set is :
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