8
15
25
2
Simplify:(−45×158)+(−13×−97)−(21×2514)
(−916×815)=?
(a) −310
(b) −415
(c) −925
(d) −25
The point from which the tangents to the circles x2+y2–8x+40=0,5x2+5y2–25x+80=0,x2+y2–8x+16y+160=0 are equal in length is