[" A "x=8x-2x-2x-2x-1" and "CE=x" .Then,find "x" ."],[" n figure,"O" is the centre of a circle."PT" and "PQ" are tangents to the circle from an external point "P" .If "],[" TPQ "=70" ,find "/_TRQ" ."],[qquad [" o."],[" o."],[" (2"])]