Answer:
Steven's mistake was made on line 2, rather than jotting down '49', left it as '-49'. This threw off his entire equation. The actual x intercepts are x = 2 and x = 5. Explanation is below
Explanation:
[tex]=\frac{7+\sqrt{-7^2-4(1)(10)} }{2(1)} \\\\=\frac{7+\sqrt{49-40}}{2\cdot \:1} \\\\=\frac{7+\sqrt{9}}{2\cdot \:1}\\\\=\frac{10}{2} = 5\\x=5[/tex]
[tex]=\frac{7-\sqrt{\left(-7\right)^2-4\cdot \:1\cdot \:10}}{2\cdot \:1}\\=\frac{7-\sqrt{9}}{2\cdot \:1}\\=\frac{7-3}{2}\\=\frac{4}{2} \\x=2[/tex]
