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Using the discriminant how many times does the graph of this equation cross the x-axis 5x squared -10x-2 equals 0?
Wiki User
∙ 13y ago
Discriminant = (-10)2 - 4*5*(-2) = 100 + 40 > 0
So the quadratic has two real roots ie it crosses the x-axis twice.
Wiki User
∙ 13y ago
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What are the possible values of k when the equation x squared plus 2kx plus 81 equals 0 has equal roots?
Using the discriminant the possible values of k are -9 or 9
What is the value of k when the equation x squared plus 2kx plus 10x plus k squared plus 5 equals 0 has equal roots?
Using the discriminant of b^2 -4ac = 0 the value of k works out as -2
How do you solve this equation to the nearest hundredth x squared -7x -12 equals 0?
Using the quadratic equation formula: x = 8.42 or x = -1.42
What is the point of contact when the tangent line y equals x plus c touches the curve y equals 3x -x -5x squared?
-2
What s the value of k when the equation x squared plus 2kx plus 10x plus k squared plus 5 equals 0 has equal roots?
Equation: x^2 +2kx +10x +k^2 +5 = 0 Using the discriminant: (2k +10)^2 -4*1*(k^2 +5) = 0 Multiplying out the brackets: 4k^2 +40K +100 -4k^2 -20 = 0 Collecting like terms: 40k +80 = 0 => 40k = -80 => k = -80/40 Therefore the value of k = -2
What is the value of k when 4x squared plus kx plus 9 equals 0?
Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.
What are the possible values of k when the equation x squared plus 2kx plus 81 equals 0 has equal roots?
Using the discriminant the possible values of k are -9 or 9
What are the possible values of k in the quadratic equation x squared plus 5kx plus 2k equals 0 which has equal real roots?
Using the discriminant formula for a quadratic equation k has a value of 8/25 or maybe 0.
What is the value of k when the equation x squared plus 2kx plus 10x plus k squared plus 5 equals 0 has equal roots?
Using the discriminant of b^2 -4ac = 0 the value of k works out as -2
What is the value of the discriminant for the quadratic equation d2-7d 80?
Some symbols not visible. Please resubmit using words eg "plus", "equals" etc
Is there a solution to the equation 3x squared -6x equals -2 if so what is it?
Yes because when it is rearranged in the form of 3x2-6x+2 = 0 the discriminant b2-4ac of this quadratic equation is greater than zero which means that it will have two solutions. Using the quadratic equation formula will give these solutions for x as 0.422 or 1.577 both correct to three decimal places.
What are the values of the variables when 6x squared plus 2x plus k equals 0 has repeated roots?
Equation: 6x^2 +2x +k = 0 Using the discriminant formula: k = 1/6 Using the quadratic equation formula: x = -1/6 Check: 6(-1/6)^2 +2(-1/6) +1/6 = 0
What are the values of x and k when equation of 2x squared plus 5x equals k has equal roots?
If: 2^x2 +5x = k Then: 2x^2 +5x -k = 0 Using and solving the discriminant: k = -3.125 Using and solving the quadratic equation: x = -1.25 Check: 2(-1.25)^2 +5(-1.25) = -3.125
How do you solve this equation to the nearest hundredth x squared -7x -12 equals 0?
Using the quadratic equation formula: x = 8.42 or x = -1.42
How do you solve x squared minus ten x plus six equals zero?
It can be solved by using the quadratic equation formula.
What is the point of contact when the tangent line y equals x plus c touches the curve y equals 3x -x -5x squared?
-2
How many real solutions does the following quadratic equation have by using the discriminant?
If the discriminant > 0 then 2 distinct real solutions.If the discriminant = 0 then 1 double real solution.If the discriminant < 0 then no real solutions (though there are two complex solutions).
