Advertisements
Advertisements
Question
If P = − 12x2 – 10xy + 5y2, Q = 7x2 + 6xy + 2y2, and R = 5x2 + 2xy + 4y2 ; find P – Q
Advertisements
Solution
P = − 12x2 – 10xy + 5y2
Q = 7x2 + 6xy + 2y2
R = 5x2 + 2xy + 4y2
P − Q = (− 12x2 − 10xy + 5y2) − (7x2 + 6xy + 2y2)
= − 12x2 − 10xy + 5y2 − 7x2 − 6xy − 2y2
= − 12x2 − 7x2 − 10xy − 6xy + 5y2 − 2y2
= − 19x2 − 16xy + 3y2
APPEARS IN
RELATED QUESTIONS
Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.
a − b + y = ................
Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.
xy − bd = ..............
Find the value of 2p − 3q + 4r − 8s, when p = 10, q = 8, r = 6, and s = 2
If a = 3, b = 0, c = 2 and d = 1, find the value of 2a2 − 3b2 + 4c2 − 5d2
Find the value of 3x3 – 4x2 + 5x – 6, when x = − 1.
Evaluate:
5x + (3x + 7x)
Fill in the blank:
6p − 5x + q = 6p − (...........)
Fill in the blank:
5a + 4b + 4x − 2c = 4x − (...........)
Insert the bracket as indicated:
ab + 2bc − 3ac = 2bc − (...............)
Simplify:
3x – 8 (5x – 10)
