Question

15. If D = 0 then the value of each root of the quadratic equation ax + bx + c = 0 is​

Answer 1

Answer:

if d=0 then the value of each root is equal and equal roots.

Answer 2

${\bold{\tt{f(x)=ax²+bx+c}}}$

$\red{\boxed{\tt{D=\frac{b²-4ac}{4a}}}}$⟹ ${\boxed{\tt{b²-4ac=0}}}$

$\red{\boxed{\tt{x=\frac{-b±\sqrt{b²-4ac}}{2a}}}}$

${\boxed{\tt{x_{1}=\frac{-b+\sqrt{b²-4ac}}{2a}}}}$${\boxed{\tt{x_{2}=\frac{-b-\sqrt{b²-4ac}}{2a}}}}$

${\boxed{\tt{x_{1}=\frac{-b+\sqrt{0}}{2a}}}}$; ${\boxed{\tt{x_{2}=\frac{-b-\sqrt{0}}{2a}}}}$

${\boxed{\tt{x_{1}=x_{2}=\frac{-b}{2a}}}}$${\bold{\sf{→}}}$${\red{\sf{equal \:roots}}}$