Question

Solve the equation by quadratic formula. Round to the nearest Tenth, if necessary

Answer 1

Answer:

$x = 7 \: or \: x = - 7.$

Step-by-step explanation:

${x}^{2} - 49 = 0$

Then

${x}^{2} = 49$

So

$x = 7 \: or \: x = - 7.$

Answer 2

Answer:

x = -7 , 7

Step-by-step explanation:

a² - b² = (a + b)(a - b)

x² - 49 = 0

x² - 7² = 0

(x + 7)(x -7) = 0

x + 7 = 0         ; x - 7 = 0

x = -7             ; x = 7