Welcome to Westonci.ca, the Q&A platform where your questions are met with detailed answers from experienced experts. Explore our Q&A platform to find in-depth answers from a wide range of experts in different fields. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.
Sagot :
2(x - 5)² + 13 = 31
2(x - 5)(x - 5) + 13 = 21
2(x(x - 5) - 5(x - 5)) + 13 = 21
2(x(x) - x(5) - 5(x) + 5(5)) + 13 = 21
2(x² - 5x - 5x + 25) + 13 = 21
2(x² - 10x + 25) + 13 = 21
2(x²) - 2(10x) + 2(25) + 13 = 21
2x² - 20x + 50 + 13 = 21
2x² - 20x + 63 = 21
- 21 - 21
2x² - 20x + 42 = 0
2(x²) - 2(20x) + 2(21) = 0
2(x² - 20x + 21) = 0
2 2
x² - 20x + 21 = 0
x = -(-20) +/- √((-20)² - 4(1)(21))
2(1)
x = 20 +/- √(400 - 84)
2
x = 20 +/- √(316)
2
x = 20 +/- 2√(79)
2
x = 10 + √(79)
x = 10 + √(79) U x = 10 - √(79)
2(x - 5)(x - 5) + 13 = 21
2(x(x - 5) - 5(x - 5)) + 13 = 21
2(x(x) - x(5) - 5(x) + 5(5)) + 13 = 21
2(x² - 5x - 5x + 25) + 13 = 21
2(x² - 10x + 25) + 13 = 21
2(x²) - 2(10x) + 2(25) + 13 = 21
2x² - 20x + 50 + 13 = 21
2x² - 20x + 63 = 21
- 21 - 21
2x² - 20x + 42 = 0
2(x²) - 2(20x) + 2(21) = 0
2(x² - 20x + 21) = 0
2 2
x² - 20x + 21 = 0
x = -(-20) +/- √((-20)² - 4(1)(21))
2(1)
x = 20 +/- √(400 - 84)
2
x = 20 +/- √(316)
2
x = 20 +/- 2√(79)
2
x = 10 + √(79)
x = 10 + √(79) U x = 10 - √(79)
We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Find reliable answers at Westonci.ca. Visit us again for the latest updates and expert advice.