Simplity): ((a ^ x)/(a ^ y)) * x ^ 2 + xy + y ^ 2 * ((a ^ y)/(a ^ 2)) * y ^ 2 + yz + z ^ 2 * ((a ^ 2)/(a ^ x)) ^ 2 + 2x + x ^ 2​

-18 degrees is the answer : )

1) is right

step-by-step explanation:

whatare you sayig

step-by-step explanation:

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