Advertisements
Advertisements
Question
If m = 9x2 - 4xy + 5y2 and n = - 3x2 + 2xy - y2 find: m - 3n
Sum
Advertisements
Solution
m = 9x2 - 4xy + 5y2
n = - 3x2 + 2xy - y2
∴ m - 3n
= (9x2 - 4xy + 5y2) - 3 (- 3x2 + 2xy - y2)
= 9x2 - 4xy + 5y2 + 9x2 - 6xy + 3y2
= 18x2 - 10xy + 8y2
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: 4p + p2 from 3p2 - 8p
The perimeter of a rectangle is 28x3+ 16x2 + 8x + 4. One of its sides is 8x2 + 4x. Find the other side
If m = 9x2 - 4xy + 5y2 and n = - 3x2 + 2xy - y2 find: 2m - n
Multiply: 4a + 5b and 4a - 5b
Multiply: 6xy2 - 7x2y2 + 10x3 and - 3x2y3
Copy and complete the following multi-plication:
6 - 3x + 2x2
× 1 + 5x - x2
Simplify: `"x"/2+"x"/4`
Simplify: `"x" + "x"/2 + "x"/3`
Simplify: `"3y"/5 - "y + 2"/2`
Simplify: `7/30 "of" ("p"/3 + "7p"/15)`
