The sum and the product of the zeros of a quadratic polynomial are 3 and -10 respectively. The quadratic polynomial is
(a) x2−3x+10 (b) x2+3x−10 (c) x2−3x−10 (d) x2+3x+10
Common factor in quadratic polynomials x2+8x+15 and x2+3x−10 is