Advertisements
Advertisements
Question
Add the following expression:
− x2 − 3xy + 3y2 + 8, 3x2 − 5y2 − 3 + 4xy and − 6xy + 2x2 − 2 + y2
Advertisements
Solution
(− x2 − 3xy + 3y2 + 8) + (3x2 − 5y2 − 3 + 4xy) + (− 6xy + 2x2 − 2 + y2)
= − x2 − 3xy + 3y2 + 8 + 3x2 − 5y2 − 3 + 4xy − 6xy + 2x2 − 2 + y2
= − x2 + 3x2 + 2x2 − 3xy − 6xy + 4xy + 3y2 + y2 − 5y2 + 8 − 3 − 2
= 4x2 − 5xy − y2 + 3
APPEARS IN
RELATED QUESTIONS
Find the sum of 2x2 + xy − y2, − x2 + 2xy + 3y2 and 3x2 − 10xy + 4y2.
Find the sum of x2 − x + 1, − 5x2 + 2x − 2 and 3x2 − 3x + 1
From the sum of 3a – 2b + 4c and 3b – 2c subtract a – b – c.
The sum of two expressions is 5x2 – 3y2. If one of them is 3x2 + 4xy – y2, find the other.
The sum of two expressions is 3a2 + 2ab – b2. If one of them is 2a2 + 3b2, find the other.
Fill in the blanks:
5 × 4 = .............. and 5x × 4y = ............
Fill in the blanks:
6 × 2 = .............. and 6xy × 2xy = ............
Fill in the blanks:
12 × 4 = .............. and 12ax2 × 4ax = ............
Fill in the blank:
4x × 6x × 2 = .....................
In 94, which option correctly identifies the base and the exponent?
