Multiplying out the expression, you get
2x^2 -(1/3)x . . . . . . matches selection D
Answer:
x=25.6°, left angle is 80.7°, right is 99.3°.
Step-by-step explanation:
The two expressions add to 180°.
Left angle is 3x+4°. Right side angle is 4x-3°.
Equation is 7x+1°=180°, 7x=179°, x=(179/7)° = 25.6°
The answer to your question is,
A. Multiplication
-Mabel <3