Solve the Equation 2x²+x+1=0 to find
the value of a x
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Step-by-step explanation:
1) Use completing the square to find the solutions for:
2x2 - 12x - 9 = 0
Solution:
Move the constant to the other side: 2x2 - 12x = 9
Divide by the coefficient of x2 x2 - 6x = 9/2
Take half the coefficient of x and square: x2 - 6x + 9 = 9/2 + 9
Factor the trinomial square: (x - 3)2 = 27/2
Take the square root of both sides:
Simplify the radical:
Isolate for x:
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