Advertisements
Advertisements
Question
Expand the following, using suitable identities.
(0.9p – 0.5q)2
Sum
Advertisements
Solution
We have,
(0.9p – 0.5q)2 = (0.9p)2 + (0.5q)2 – 2 × 0.9p × 0.5q ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 0.81p2 + 0.25q2 – 0.9pq
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 232]
APPEARS IN
RELATED QUESTIONS
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 197 × 203
Find the value of x, if 4x = (52)2 − (48)2.
Find the following product: (y2 + 12) (y2 + 6)
Evaluate the following: 35 × 37
Evaluate the following by using identities:
983
Simplify: (x – 2y + 3z) (x2 + 4y2 + 9z2 + 2xy + 6yz – 3xz)
Multiply the following:
(3x2 + 4x – 8), (2x2 – 4x + 3)
Using suitable identities, evaluate the following.
(1005)2
Using suitable identities, evaluate the following.
(995)2
Perform the following division:
(– qrxy + pryz – rxyz) ÷ (– xyz)
