Prove that the equation x ^ 2-4x + 5 = 0 is equivalent to the equation 3 + 2 * | 1-2x | = 0
August 13, 2021 | education
| If the equations have the same set of roots, then they are considered equivalent. If the equations have no roots, then they are also equivalent.
Let’s solve the quadratic equation:
x ^ 2 – 4 * x + 5 = 0.
D = (-4) ^ 2 – 4 * 1 * 5 = 16 – 20 = -4.
If the discriminant is negative, then the equation will have no roots.
Let’s solve the second equation:
3 + 2 * | 1 – 2 * x | = 0.
Since the sum is equal to 0 and 3> 0, the expression 2 * | 1 – 2 * x | must be negative, but this cannot be, therefore the equation has no roots.
Equivalence has been proven.
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