Answer:
Step-by-step explanation:
Let's apply the formula (x+y)² = x² + 2xy + y²
Here, x = -a and y = b
So,
= (-a)² + 2(-a)(b) + (b)²
= a² - 2ab + b²
Hence, it has been proved that (-a + b)² = a² - 2ab + b².
Hope this helped!
72°
∠ AOB = 20% of 360° = 0.2 × 360° = 72°
arc AB is equal to the angle subtended at the centre , that is
arc AB = 72°
4,845
Hope this helps:)
1,203.
Answer:D