Question

please help me......​

Answer 1

You need the relation between coefficients and zeros.

It's such a long name, but don't forget it.

The Relation

Sum and multiplication of zeros of

quadratic equation ax²+bx+c=0 is

• Sum : -b/a
• Multiplication : c/a

Proof

It is proved by the quadratic formula, $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$.

By getting the sum and the multiplication.

Now you can do it!