Make a question similar to the one below:

for example:

Solve this quadratic equation: x^2 = 81

and then solve it and explain how you did it.

Question

Mathematics

Laci Estrada

22 May, 16:39

Make a question similar to the one below:

for example:

Solve this quadratic equation: x^2 = 81

and then solve it and explain how you did it.

+3

Answers (1)

Know the Answer?

Marlon · Answer 1

two solutions : 9; - 9

Step-by-step explanation:

x²=81

means : x² - 81 = 0 but 81 = 9²

use identity; a² - b² = (a-b) (a+b)

x² - 9² = 0 : (x-9) (x+9) = 0

x-9=0 or x+9 = 0

x = 9 or x = - 9

Make a question similar to the one below:for example:Solve this quadratic equation: x^2 = 81and then solve it and explain how you did it.

Make a question similar to the one below:

for example:

Solve this quadratic equation: x^2 = 81

and then solve it and explain how you did it.