Question

X2 - 7x + 9 =0 please leave answer in surf form and simplify ​

Answer 1

Answer:

Using quadratic formula again :)

Answer 2

Answer:

x = $\frac{7}{2}$ ± $\frac{\sqrt{13} }{2}$

Step-by-step explanation:

Given

x² - 7x + 9 = 0 ( subtract 9 from both sides )

x² - 7x = - 9

Solve using the method of completing the square

add ( half the coefficient of the x- term)² to both sides

x² + 2( - $\frac{7}{2}$ )x + $\frac{49}{4}$ = - 9 +

(x - $\frac{7}{2}$ )² = $\frac{13}{4}$ ( take the square root of both sides )

x - $\frac{7}{2}$ = ± $\sqrt{\frac{13}{4} }$ = ± $\frac{\sqrt{13} }{2}$ ( add

x = $\frac{7}{2}$ ± $\frac{\sqrt{13} }{2}$ = $\frac{7+/-\sqrt{13} }{2}$