2 quadratic equations questions...

1. Suppose a and b are two distinct roots of the equation x^2 +3x -2=0
(a) Find the values of a^2 +3a and b^2 +3b
*(b) Hence fin the value of a+b Ans:-3
2. Solve x^2+2ax+b=0
Ans: -a+開方(a^2-b) 或 -a-開方(a^2-b)
2 個解答 2