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Q: What is x when x squared plus x - 20 equals 0?

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144

y equals negative 8.

x2 + 6x + 8 = 0 Solve for x.X = -2 or X = -4

y equals x plus 4 when y equals 0 then x equals 2i i is the square root of negative 1

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Related questions

If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored

x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}

It is: 3x2+6x-11 = 0

It can not be factored because its discriminant is less than zero

63828

x2-35x+300 = 0 (x-15)(x-20) = 0 x = 15 or x = 20

It is a quadratic equation.

4

x = -½

The solutions are: x = 4, y = 2 and x = -4, y = -2

x2 = x+20 x2-x-20 = 0 (x-5)(x+4) = 0 x = 5 or x = -4

True because in both equations x = 0 or x = -4

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