ЧЬ^2 -ЧЬ +1
How do u factor is

(2b-1)(2b-1)

Step-by-step explanation:

Check your work

2b x 2b = 4b^2

2b x -1 = -2b

-1 x 2b = -2b

-1 x -1 = 1

Simplify

4b^2-4b+1

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15