Solve for d.d2+3d–4=0Write each solution as an integer, proper fraction, or improper fraction in simplest form. If there are multiple solutions, separate them with commas.
Question
Solve for d.d2+3d–4=0Write each solution as an integer, proper fraction, or improper fraction in simplest form. If there are multiple solutions, separate them with commas.
Solution
The given equation is a quadratic equation in the form of ax^2 + bx + c = 0, where a = 1, b = 3, and c = -4.
The solutions to a quadratic equation can be found using the quadratic formula, which is given by:
x = [-b ± sqrt(b^2 - 4ac)] / (2a)
Substituting the values of a, b, and c into the quadratic formula gives:
d = [-3 ± sqrt((3)^2 - 41(-4))] / (2*1) d = [-3 ± sqrt(9 + 16)] / 2 d = [-3 ± sqrt(25)] / 2 d = [-3 ± 5] / 2
This gives two solutions:
d = (-3 + 5) / 2 = 1 d = (-3 - 5) / 2 = -4
So, the solutions to the equation d^2 + 3d - 4 = 0 are d = 1 and d = -4.
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