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By using the quadratic formula.
-b +/- sqrt(b^2-4ac)/2a
a = 2
b = 8
c = 5
-8 +/- sqrt(8^2-4(2)(5))/2(2)
-8 +/- sqrt(64-40)/4
-8 +/-sqrt(24)/4
X = -0.7752551286
X = -3.224744871
my TI-84 graphing calculator confirms this.
you may want that exact answer
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How would you solve 2x plus 1 equals 9?
2x+1 = 9 2x = 9-1 2x = 8 x = 4
What is 4x squared minus 5x squared plus 2x?
-x2+2x
How do you factor 2x squared plus 8x plus 20 equals 0?
It can not be factored because its discriminant is less than zero
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2x2 + 2x = 2x(x+1)
Solve for x 8x equals 2x plus 15?
8x = 2x + 15 6x = 15 x = 15/6 = 2.5
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(x - 3)(x + 5)
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2x + 52 = 7 2x + 25 = 7 2x = 7 - 25 2x = -18 x = -18/2 x = -9
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x2 - 2x + 55 = 90x2 - 2x - 35 = 0(x+5)(x-7) = 0x = -5, 7
What is the answer to 7x squared plus 2x equals 0?
63828
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 solve for x 2x plus a equals p?
2x+a=p 2x=p-a x=.5p-.5a
Y plus 2x equals 0 solve for y?
y= -2x
How do you solve x squared plus x squared plus x?
Add the x's squared together to get 2x^2+x. You cannot add anymore so the answer is 2x^2+x
How do you solve y equals 2x squared plus 1?
The solution comprises every point on a parabola which is symmetric about the y axis and has its apex at (0,1).
How do you solve 2x squared plus x plus 2 equals 0 by completing the square?
It cannot be solved because the discriminant of the quadratic equation is less than zero
What is -2x squared plus 3x plus 5 equals 0?
It is a quadratic equation.
Solve 2x plus 3 equals 9?
3
