quadratic formula/discriminant question

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Let 7x^2 + 5x = h. What value of h will give us exactly one solution for x?

Guest Jul 7, 2016

+33665

+5

Best Answer

For the general quadratic ax^2 + bx + c = 0 there is just one solution when b^2 - 4ac = 0, so here:

5^2 - 4*7*(-h) = 0 or h = -25/28 as given by Guest #1

Alan Jul 8, 2016

Alan · Answer 1 · 2016-07-08T08:56:48

For the general quadratic ax^2 + bx + c = 0 there is just one solution when b^2 - 4ac = 0, so here:

5^2 - 4*7*(-h) = 0 or h = -25/28 as given by Guest #1

Guest · Answer 2 · 2016-07-07T11:50:44

h = - 25/28