It is given that -3 is one of the roots of the quadratic equation x square -4x-h=0.find the value of h

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asked Dec 2, 2015 8.6k views

1 Answer

Robert Christie · Answer 1 · 2015-12-09T12:08:42+0000

Since -3 is one of the roots, that means it would satisfy the equation.

x^2 - 4x - h = 0, substitute x = -3.

(-3)^2 -4(-3) - h = 0
9 + 12 - h = 0
21 - h = 0
21 = h.
h = 21.
That's the value of h. Cheers.

It is given that -3 is one of the roots of the quadratic equation x square -4x-h=0.find the value of h

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