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Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation a(a-18) = -45 .
Question type: Equation
Solution:Original question:
| a | ( | a | − | 18 | ) | = | - | 45 |
| Left side of the equation = | a | a | − | a | × | 18 |
| a | a | − | 18 | a | = | - | 45 |
After the equation is converted into a general formula, it is converted into:
( a - 3 )( a - 15 )=0
From
a - 3 = 0
a - 15 = 0
it is concluded that:：
a1=3
a2=15
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》