Question

a number subtract from its half give 23

Answer 1

let the number be x
According to question :
23 ÷ 1 / 2 = x
23 × 2 = x
46 = x

So , 46 is the number , whose half is equal to 23

Hope it helped ☺☺

Answer 2

1/2x-x=23
x/2-x=23
×/2-×^2/2=23
(x-x^2)/2=23
23×2=(x-x^2)
×^2-x+46=0
^This is the quadratic eqn formed..

now u can use quadratic formula to find the ans...

x=[-b(+/-)root of (b^2 -4ac)]/2a
x=[-(-1)(+/-)root of ((-1)^2-4×1×46)]/2×1
x=[1(+/-)root of (1-184)]/2
x=[1(+/-)root of -183]/2
x=[1+root of 183]/2 AND x=[1- root of 183]/2
x=[1+13.52]/2 AND x=[1-13.52]/2
x=[14.52]/2 AND x=[-12.52]/2
x= 7.26 AND x= -6.26


I guess it's correct...thanks...