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x2+2x=9 we can complete the square or use the quadratic formula. Let's complete the square. add 2/2=1 to both sides and we ahve x2+2x+1=10 now factor the left side and use the square root property (x+1)2=10 so x+1= plus of minus the square root of 10 x=- 1+ or - square root of 10 using the quadratic formula we have a=1, b=2 and c=-9 so [-2+ or - (square root of (4+36))]/2= -1 + or - square root of 10 as we had before.
What else can I help you with?
What is 10y squared -23y plus 9 factorised?
(5x-9)(2x-1) when factored
IF 2 plus 3 equals 10. 7 plus 2 equals 63. 6 plus 5 equals 66. 8 plus 4 equals 96 therefore 9 plus 7 equals?
2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.
What is the answer to the equation 2x plus 3 equals 9 x equals?
21
3x-3 equals 2x plus 6?
3x - 3 = 2x + 6 3x = 2x + 9 x = 9
8x plus 2x equals 90?
x = 9.
Is -2x squared plus 2x plus 1 equals 9 a quadratic equation?
Yes it is. The thing that makes it a quadratic equation is that "x squared" in there.
How do you solve 2X plus 5 squared equals 7?
2x + 52 = 7 2x + 25 = 7 2x = 7 - 25 2x = -18 x = -18/2 x = -9
What are the factors of 2x squared plus 9x plus 9?
(2x+3)(x+3)
How do you factor 4x squared minus 36x plus 81?
(2x - 9)(2x - 9) or (2x - 9)2
Who can factor 2X squared minus 11X plus 9?
(x - 1)(2x - 9)
2x equals -x plus 9?
2x = -x +9
1 over 2x plus 13 equals 9?
The answer to 1 over 2x plus 13 equals 9 is x equals -8.
Who can factor this 2x squared 9x plus 9?
(2x+3)(x+3)
How do you factor 4x squared - 12x plus 9?
(2x - 3)(2x - 3)
3x squared -5x plus 1 plus 8x squared - 2x -9?
(5x 2 - 8x + 1) + (2x 2 - 4x - 11)
What is the factorization of the trinomial 2x squared plus 9x plus 9?
2x2+9x+9 = (2x+3)(x+3) when factored
Y equals 5x plus 18 y equals 2x plus 9?
5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
