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I assume you mean the equation 2x2 + 12x - 10 = 0.
Divide by 2:
x2 + 6x - 5 = 0
To complete the square, the constant part (the part with no variable) must be half the linear part (1/2 of 6), squared, so in this case you add 14 to each side:
x2 + 6x +9 = 14
This can be factored:
(x+3)2 = 14
Now, just take the square root of each side:
x + 3 = (plus-or-minus) 14
Solve the resulting two equations (one for plus, one for minus).
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Can you solve by completing the square x2 plus 10x plus 220?
No because the discriminant of the given quadratic expression is less than zero.
X2 plus 20x equals 30 solve by completing the square?
x2 + 20x +0 =30 [(20/2)2 =100] x2 + 20x + 100 =30 +100 √(x+10)2=√130 x+10=√130 x= −10+√130 √ means square root
What is the fifth step in solving the eqution by completing the square 3x2 plus 14x plus 8 equals 0?
3x2+14x+8 = 0 x = -2/3 or x = -4
How do you solve t to the second power equals 169?
Well, darling, to solve for t when t squared equals 169, you simply take the square root of both sides. So, t equals plus or minus the square root of 169, which is 13. Easy peasy lemon squeezy. Now go show off your math skills, honey!
How do you solve for x when a plus x equals b?
x=b-a
