Answer:
∠5=∠7=∠6=∠8=143°
∠4=∠2=∠1=37°
Step-by-step explanation:
∠4=180-∠6=180-143=37°
Is the x2 supposed to be squared?
Answer: The required product is 
Step-by-step explanation: We are to find the product f the following two algebraic expressions:

To find the product of the above two expressions, we must multiply each term of the first expression with each term of the second expression.
The multiplication is as follows:

Thus, the required product is 
Answer:
D is your answer
Step-by-step explanation: