Question

यदि p (x) = x2- 3x -4,तो p (x) का एक शून्यक करता होगा ?
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Answer 1

Answer:

Factorise p(x)

You get p(x) = (x-4)(x+1)

Roots formed when p(x) = 0.

So, now p(x) = 0.

x = 4,-1

Answer 2

Answer:

p (x) = x2- 3x -4

b²-4ac = (-3)² - (4) (1) (-4)

= 9 + 16

= 25

x = -b ±√b²-4ac / 2a

x = 3 ± 5 / 2

x = 3 + 5 / 2 or 3 - 5 / 2

x = 4 or x = -1