What is the centre of the circle ?
Answer and explanation
Correct answer: A.
- Step 1: Complete the square in and : .
- Step 2: The centre is .
Answer
.
Why not the others: : The signs of the coordinates were reversed. : The coefficients of and were used directly. : The coordinates were swapped.
Practise more Spatial Geometry and Integral Calculus.
Free questions with an explanation for every one, and full timed Thanawiya Amma (Egypt) mock tests.