Advertisements
Advertisements
Question
If m = 9x2 - 4xy + 5y2 and n = - 3x2 + 2xy - y2 find: m + 2n
Sum
Solution
m = 9x2 - 4xy + 5y2
n = - 3x2 + 2xy - y2
∴ m + 2n
= (9x2 - 4xy + 5y2) + 2 (- 3x2 + 2xy - y2)
= 9x2 - 4xy + 5y2 - 6x2 + 4xy - 2y2
= 9x2 - 6x2 - 4xy + 4xy + 5y2 - 2y2
= 3x2 + 3y2
shaalaa.com
Performs Operations (Addition and Subtraction) on Algebraic Expressions with Integral Coefficients Only.
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Subtract: 4x from 8 - x
Subtract: −xy + yz − zx from xy − yz + xz
Subtract the sum of 3a2 – 2a + 5 and a2 – 5a – 7 from the sum of 5a2 -9a + 3 and 2a – a2 – 1
If x = 4a2 + b2 - 6ab; y = 3b2 - 2a2 + 8ab and z = 6a2 + 8b2 - 6ab find: x - y - z
Copy and complete the following multi-plication:
3xy - 2x2 - 6x
× -5x2y
Multiply: mn4, m3n and 5m2n3
Multiply: pq - pm and p2m
Multiply: x3 - 3y3 and 4x2y2
Multiply: x2 + 5yx - 3y2 and 2x2y
Simplify: `"2p"/3 -"3p"/5`
