标签：Quadratic - 英国华人论坛

Consider the product of the two linear expressions (y+a) and (y+b).(y+a)(y+b) = y(y+b) + a(y+b) = y^2 + by + ay + ab = y^2 + y(a+b) + abWe can write it asy^2 + y(a+b) + ab = (y+a)(y+b) .......(i)Similarly, Consider the product of the two lin...英国华人论坛

Derivation of Quadratic formula:To solve ax^2 + bx + c = 0 where a ( ` 0 ), b, c are constants which can take real number values.ax^2 + bx + c = 0or ax^2 + bx = -cDividing by 'a' on both sides, we getx^2 + (bDa)x = -cDaor x^2 + 2x(bD2a) = -c...英国华人论坛