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(1) X ^ 2-2 root sign 3 times x = 0 (2) 3x ^ 2-6x = 3 (3) 3x (x-2x) = 3 (4) 3x ^ 2-6x-3 = 0 (5) 4x ^ 2-121 = 0
In order to let you really learn to find the following of quadratic equation
Suggestions: problem solving methods: 1, judge whether a special quadratic equation of one variable, such as complete square formula (into the square of a formula), square difference formula (generally cross multiplication)
2. Formula method, directly into the formula
(1) To (x-radical 3) ^ 2 = 5
(2) To (x-1) ^ 2 = 2
(3) To x ^ 2 = 121 / 4
If the value of formula 5x-7 is 3, then x = if the solution of the equation AX + 2 = a + 1 about X is x = 2, then a=
If the value of formula 5x-7 is 3, then x=
If the solution of the equation AX + 2 = a + 1 about X is x = 2, then a=
If the value of formula 5x-7 is 3, then x = 2
If the solution of the equation AX + 2 = a + 1 about X is x = 2, then a = - 1
If x = 2 is the solution of the equation AX + 3 = 5, then the value of a is ()
A. 1B. -1C. 2D. -2
Substituting x = 2 into the equation: 2A + 3 = 5, the solution: a = 1
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