book Maths Puzzle Numerical Ability

HOW DO I FIND THE EQUATION OF A CIRCLE WHERE THE CENTER IS (-3, 4) AND A POINT ON THE EDGE IS (4, 6).

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book Other Question

How many pounds of candy selling for $5.80 per pound should be mixed with 7 pounds of candy selling for $2.40 per pound to obtain a mixture selling for $3.42 per pound? x2+2x+3=0 have to solve it by fatrisation or by completing square. from new syllabus d book 3 chapter 1 ex 1c.