Advertisements
Advertisements
प्रश्न
The value of (a + b)2 + (a – b)2 is ______.
विकल्प
2a + 2b
2a – 2b
2a2 + 2b2
2a2 – 2b2
Advertisements
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
Identify the term, their coefficients for the following expression:
7x2yz − 5xy
In -5x3y2z4 ; write the coefficient of yz2. Also, write the degree of the given algebraic expression.
Find the sum of: 4x3 + 2x2 – x + 1, 2x3 – 5x2 – 3x + 6, x2 + 8 and 5x3 – 7x
Subtract the second expression from the first:
5a + b, - 6b + 2a
Enclose the given term in bracket as required:
x – y – z = x - {…….)
Find the missing term
_________ × (−15m2n3p) = 45m3n3p2
The factorisation of 2x + 4y is ______.
Identify the term and its factor in the following expression.
Show the term and factor by tree diagram.
1 + x + x2
Identify term and factor in the expression given below:
− 4x + 5y
Write the coefficient of x2 in the following:
x3 – 2x2 + 3x + 1
