Advertisements
Advertisements
प्रश्न
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (79)2 − (69)2
Advertisements
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
Show that `(4/3 m - 3/4 n)^2 + 2mn = 16/9 m^2 + 9/16 n^2`
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 9.8 × 10.2
Simplify the following using the identities: 178 × 178 − 22 × 22
Evaluate the following: 102 × 106
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
Simplify:
`(3/4x - 4/3y)^2 + 2xy`
Simplify:
(s2t + tq2)2 – (2stq)2
Expand the following, using suitable identities.
(a2 + b2)2
Using suitable identities, evaluate the following.
(1005)2
Perform the following division:
(ax3 – bx2 + cx) ÷ (– dx)
