1. 3x²=5

2. x²-18x=9

Question

Mathematics

Guest

24 July, 17:44

1. 3x²=5

2. x²-18x=9

+2

Answers (1)

Know the Answer?

Nigel Farmer · Answer 1

3x² = 5

3 3

x² = 1²/₃

x ≈ 1.2909

x² - 18x = 9

x² - 18x - 9 = 0

x = - (-18) + / - √ ((-18) ² - 4 (1) (-9))

2 (1)

x = 18 + / - √ (324 + 36)

2

x = 18 + / - √ (360)

2

x = 18 + / - 6√ (10)

2

x = 9 + 3√ (10)

x = 9 + 3√ (10) x = 9 - 3√ (10)

1. 3x²=52. x²-18x=9

1. 3x²=5

2. x²-18x=9