Answer:
two real, unequal roots
Step-by-step explanation:
y is definied as y = 3x - 1. Substitute 3x - 1 for y in xy = 9, obtaining:
x(3x - 1) = 9. Then:
3x^2 - x - 9 = 0. In this quadratic, the coefficients are a = 3, b = -1 and c = -9.
Calculating the discriminant b^2 - 4ac, we get (-1)^2 - 4(3)(-9), or 1 + 108, or 109. Because the discriminant is positive, we have two real, unequal roots.
The answer is A, because $9,841.28 minus $7,429.84 is <span>$2,411.44</span>
Answer:
What are the solutions of the equation 9x4 – 2x2 – 7 = 0? Use u substitution to solve
Step-by-step explanation:
