Ask Question
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)
  1. 22 May, 20:08
    0
    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
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “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. ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers