If a − b, a and a + b are zeroes of the polynomial x − 3 + x + 1, then the value of is
If P( -1,1 ) is the midpoint of the line segment joining A( -3,b ) and B ( 1, b + 4), then the value of b is
THe perimeters of two similar triangles are 30cm and 20cm respectively . If one side of the first triangle is 12cm , the determine the corresponding side of the second triangle