Question

Why is the answer to this C and not E. Don’t you usually keep the negative number negative? Why is this one not left negative?

Answer 1

Answer:

C

Step-by-step explanation:

Given

x² = 7x - 3 ( subtract 7x - 3 from both sides )

x² - 7x + 3 = 0 ← in standard form

with a = 1, b = - 7, c = 3

Using the quadratic formula to solve for x

x = ( - (- 7) ± $\sqrt{(-7)^2-(4(1)(3)}$ ) / 2

  = ( 7 ± $\sqrt{49-12}$ ) / 2

  = $\frac{7+/-\sqrt{37} }{2}$ → C