Question

if x square = 4x find x ?
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Answer 1

Step-by-step explanation:

X²−4x+k=0 is of the form ax²

+bx+c=0 where a=1b=−4c=k

Roots are equal⇒ Discriminant=0

⇒b² −4ac=0

⇒(−4)²

−4×1×k=0

⇒16−4k=0

⇒−4k=−16

$k = \frac{16}{4} = 4$

Answer 2

x-4x+k=0 is of the form ax ²+bx+c=0 where a=1b=−4c=k

Roots are equal⇒ Discriminant=0

⇒b ² −4ac=0

⇒(−4) ² −4×1×k=0

⇒16−4k=0

⇒−4k=−16

∴k= 4/16

=4