Advertisements
Advertisements
प्रश्न
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (79)2 − (69)2
उत्तर
Here, we will use the identity \[(a - b)(a + b) = a^2 - b^2\]
Let us consider the following expression:
\[\left( 79 \right)^2 - \left( 69 \right)^2 \]
\[ = \left( 79 + 69 \right)\left( 79 - 69 \right)\]
\[ = 148 \times 10\]
\[ = 1480\]
APPEARS IN
संबंधित प्रश्न
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 9.8 × 10.2
Find the value of x, if 14x = (47)2 − (33)2.
Find the following product: (x − 3) ( x − 2)
Find the following product: (p2 + 16) \[\left( p^2 - \frac{1}{4} \right)\]
Evaluate the following by using identities:
10013
On dividing 57p2qr by 114pq, we get ______.
Simplify:
(ab – c)2 + 2abc
Expand the following, using suitable identities.
(2x – 5y)(2x – 5y)
Expand the following, using suitable identities.
(a2 + b2)2
Perform the following division:
(– qrxy + pryz – rxyz) ÷ (– xyz)
