0
Y = 7 + 2X - 2X^2
set = to 0
7 + 2X - 2X^2 = 0
arrange in standard quadratic form
2X^2 - 2X - 7 = 0
I am too lazy to factor, so the quadratic equation........
-b +/- sqrt(b^2-4ac)/2a
a = 2
b = -2
c = -7
check with discriminant. b^2 - 4ac
-2^2 - 4(2)(-7) = 60; greater than 1; 2 real roots
-(-2) +/- sqrt[(-2)^2 - 4(2)(-7)]/2(2a)
2 +/- sqrt(60)/4
2 +/- 2sqrt(15)/4
not pretty, just, save factoring, exact
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∙ 13y ago
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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
If x equals 4 then 2x plus 7 equals?
If x=4 then 2x+7 =
What is 2x plus 8 plus x equals 2x plus 15?
X=7
How do you solve 3x squared minus 2x plus 7 equals 0?
I suggest you use the quadratic formula, with a = 3, b = -2, c = 7.
What is -7 plus 2x equals x plus 8?
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
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
How do you solve x squared plus 55 -2x equals 90?
x2 - 2x + 55 = 90x2 - 2x - 35 = 0(x+5)(x-7) = 0x = -5, 7
Find the slope of the line of 2x plus 2y equals 7?
The slope of the line of 2x plus 2y equals 7 is (7/2x - 1).
What is 2x plus 8y plus 7 equals 0?
2x = -7 - 8y
If x equals 4 then 2x plus 7 equals?
If x=4 then 2x+7 =
8x-7 plus 2x equals 6 plus 5x plus 2?
8x-7 plus 2x equals 6 plus 5x plus 2?
What is 2x plus 8 plus x equals 2x plus 15?
X=7
How do you solve 3x squared minus 2x plus 7 equals 0?
I suggest you use the quadratic formula, with a = 3, b = -2, c = 7.
What is -7 plus 2x equals x plus 8?
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
How do you factor 2x squared plus 3x minus 14?
(x - 2)(2x + 7)
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.
Factor the trinomial 2x squared plus 9x7?
If you mean: 2x^2 +9x +7 then it is (2x+7)(x+1) when factored
