I need help plss help me

No

Step-by-step explanation:

Assuming sides ABC, the values of the angles would be the following.

Angle ∠A = 94.905° = 94°

Angle ∠B = 35.535° = 35°

Angle ∠C = 49.561° = 49°

A right triangle is a triangle with a 90° angle. Therefore, the answer is no.

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