Question

b² - 2b = 7 show me the solution please

Answer 1

Step-by-step explanation:

b² - 2b = 7

=> b² - 2b - 7 = 0

Here ,

• a = 1
• b = (-2)
• c = (-7)

=> x = -b ± √b² - 4ac / 2a

=> x = 2 ± √ 4 + 28 / 2

=> x = 2 ± √32 /2

=> x = 2 ± 4√2/2

=> x = 2 + 4√2/2 , 2 - 4√2/2

.°. x = 1 + 2√2 , 1-2√2

Answer 2

Answer:

30-23=7 I think it's not correct ans