Question

the zeroes of the quadratic polynomials x^2- 25x+ 156 is positive or negative ​

Answer 1

Answer:

We have equation  : x 2 - 88 x +  125

And we know quadratic formula :

x  = −b±b2 − 4ac√2a

Here a  =  1  ,  b  =   - 88  and c =  125

So,

x  = −( −88 )±( −88 )2 − 4× 1 × 125√2 × 1 = 88 ±7744 −500√2  = 88 ±21811√2= 44 ±1811−−−−√ =  44 ± 42.55

So,

Zeros of our polynomial  x  =  44  + 42.55 = 86.55

And

x  =  44  - 42.55 = 1.45

So,

Both zeros are positive , So ans is option 1

Answer 2

X^2-25x+156
a=2 b=- 25 c= 156
D = 625- 4*1*156
625-624 = 1
X= (25 +- 1)/2
26/2 or 24/2
13 or 12