Scholarship Exam Preparation App
Class 8 - (Math )
Algebra - Polynomial, their operations and factors of polynomial
(x2- 7x)2- 8(x2- 7x) - 180 Which of the following are terms of the polynomial?
a :
(x-9) (x+2) (x-10) (x+3)
b :
(x-9) (x+2) (x-5) (x+6)
c :
(x-18) (x+10) (x2-7x)
d :
(x2-7x-18) (x2-7x+10)
Explanation :
Letx2- 7x = m.
The equation becomes m2- 8m - 180.
Its limbs are (m-18)(m+10).
Putting back the value of m gives (x2-7x-18) and (x2-7x+10).
Dismembering them again gives (x-9)(x+2) and (x-10)(x+3).
The equation becomes m2- 8m - 180.
Its limbs are (m-18)(m+10).
Putting back the value of m gives (x2-7x-18) and (x2-7x+10).
Dismembering them again gives (x-9)(x+2) and (x-10)(x+3).