Advertisements
Advertisements
प्रश्न
The value of (a + b)2 + (a – b)2 is ______.
विकल्प
2a + 2b
2a – 2b
2a2 + 2b2
2a2 – 2b2
उत्तर
The value of (a + b)2 + (a – b)2 is 2a2 + 2b2.
Explanation:
We have,
(a + b)2 + (a – b)2 = (a2 + b2 + 2ab) + (a2 + b2 – 2ab) ...[∵ (a + b)2 = a2 + b2 + 2ab and (a – b)2 = a2 + b2 – 2ab]
= (a2 + a2) + (b2 + b2) + (2ab – 2ab) ...[Combining the like terms]
= 2a2 + 2b2
APPEARS IN
संबंधित प्रश्न
For the following monomials, write its degree: – x2y
Write numerical co-efficient of the following: – 8xy3
Fill in the blank:
4a + 3b – 7a + 4b = _____
Add : 18pq – 15pq and 3pq
The value of (a + b)2 – (a – b)2 is ______.
The factors of a2 – 2ab + b2 are (a + b) and (a + b).
On dividing `p/3` by `3/p`, the quotient is 9.
Write the greatest common factor in the following terms.
qrxy, pryz, rxyz
Factorise the following expression.
ax3 – bx2 + cx
Identify term and factor in the expression given below:
xy + 2x2y2
