Answer:x²-2x-8
X²-2x=8
X²= -2x + (-1)² = 8 + (-1)²
X²= -2x + 1 = 8 + 1
X²= -2x + 1 = 9
(X-1)² = 9
√(x-1)² = √9
X-1 = ± 3
X= 1 + 3= 4
X= 1 - 3= -2
X= 4 or X= -2
Step-by-step explanation:
Answer:5
Step-by-step explanation:
Answer:
it's A,B and D , Edge 2021
Step-by-step explanation:
Answer:

Step-by-step explanation:
<u>Right Triangle</u>
The figure shows a right triangle with angles 2 and 3 unknown.
The sum of the internal angles of all triangles is 180°, since one of them is 90°, then the sum of the rest of the angles is 90°. It means that:

The measures of both angles are expressed as functions of x. Substituting their values:
x+8 + 2x + 7 = 90
Simplifying:
3x + 15 = 90
Operating:
3x = 90 - 15 = 75
Solving:
x = 75 / 3 = 25
x = 25°
Now, the measure of angle 2=x+8 = 33°
