Two brothers, ty and cam, went to a local bookstore to buy books for school. ty bought 8 books for $113.92, and cam bought 6 books for $92.82. they then compared their average cost per book.
ty paid an average cost of $
per book. cam paid an average cost of $
per book.
so,
paid an average cost of $
more per book than his brother.

answer: what do you mean

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