The line l1 l_1\,l1 passes through the point A(2,5)A(2, 5)A(2,5) and has gradient −12\displaystyle -\frac{1}{2}−21.
Find an equation of l1l_1l1, giving your answer in the form y=mx+cy = mx + cy=mx+c.
The point B B\,B has coordinates (−2,7)(-2, 7)(−2,7). Show that B B\,B lies on l1l_1l1.
Find the length of ABABAB, giving your answer in the form k5k\sqrt{5}k5, where k k\,k is an integer.
The point C C\,C lies on l1 l_1\,l1 and has xxx-coordinate equal to ppp. The length of AC AC\,AC is 5 units. Show that p p\,p satisfies
p2−4p−16=0. p^2 - 4p - 16 = 0. p2−4p−16=0.Practise Edexcel A Level Old Maths Coordinate Geometry with exam-style questions for A Level Old Maths. 6 questions, matched to the Edexcel A Level Old Maths (9371) specification and written in Unit exams C1, C2, C3 and C4 plus two applied units (e.g. S1 and M1) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.