Yes. x2 + 4 = ( x + 2i ) times ( x - 2i ) where 'i' = the unit imaginary number = the square root of -1.
That expression can not be factored.
This quadratic expression can't be factored because its discriminant is less than zero.
This quadratic expression can't be factored because its discriminant is less than zero.
It is a quadratic expression and when factored is: (x+1)(x+1)
The given quadratic expression can not be factored as a perfect square.
That expression can not be factored.
x2+7x-18 = (x+9)(x-2) when factored
This quadratic expression can't be factored because its discriminant is less than zero.
This quadratic expression can't be factored because its discriminant is less than zero.
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x2+2x-15 = (x+5)(x-3) when factored
It is a quadratic expression and is (x-3)(x+5) when factored
The given quadratic expression can not be factored as a perfect square.
It is a quadratic expression which can't be factored because its discriminant is less than zero
It is a quadratic expression and when factored is: (x+1)(x+1)
It is (x+6)(x-4) when factored
x2 + 6x - 5 is a quadratic expression that can not be factored.