wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

From
(i) p3 − 4 + 3p2, take away 5p2 − 3p3 + p − 6
(ii) 7 + x − x2, take away 9 + x + 3x2 + 7x3
(iii) 1 − 5y2, take away y3 + 7y2 + y + 1
(iv) x3 − 5x2 + 3x + 1, take away 6x2 − 4x3 + 5 + 3x

Open in App
Solution

(i) Required expression = (p3 - 4 + 3p2) - (5p2 - 3p3 + p - 6)
= p3 - 4 + 3p2 - 5p2 + 3p3 - p + 6
= p3 + 3p3 + 3p2 - 5p2- p - 4+ 6
= 4p3 - 2p2 - p + 2

(ii) Required expression = (7 + x - x2) - (9 + x + 3x2 + 7x3)
= 7 + x - x2 - 9 - x - 3x2 - 7x3
= - 7x3- x2 - 3x2 + 7 - 9
= - 7x3 - 4x2 - 2

(iii) Required expression = (1 - 5y2) - (y3+ 7y2 + y + 1)
= 1 - 5y2 - y3 - 7y2 - y - 1
= - y3- 5y2 - 7y2 - y
= - y3- 12y2 - y

(iv) Required expression = (x3 - 5x2 + 3x + 1) - (6x2 - 4x3 + 5 +3x)
= x3 - 5x2 + 3x + 1 - 6x2 + 4x3 - 5 - 3x
= x3 + 4x3 - 5x2 - 6x2 + 1 - 5
= 5x3 - 11x2 - 4

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Finding the Value of an Expression
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon