The browser that is used for submitting questions does not permit many mathematical symbols. It is therefore not possible to be sure what the question is. For a quadratic equation of the form y = ax^2 + bx + c, where a, b and c are real numbers and a is non-zero, the discriminant is b^2 – 4ac.
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Discriminant = b2-4ac = (-2)2-(4*4*4) = -60
16x = 4 Divide both sides by '16' Hence 16x/16 = 4/16 x = 4 / 16 x = 1/4
It has 2 real solutions because the discriminant is greater than zero.
Divide by 16, which gives you x=4/16 The 4/16 cancels down to 1/4.
80. You have to multiply 16 by 5.