Advertisements
Advertisements
प्रश्न
Expand the following, using suitable identities.
(2x – 5y)(2x – 5y)
Advertisements
उत्तर
We have,
(2x – 5y)(2x – 5y) = (2x – 5y)2
= (4x)2 + (5y)2 – 2 × 2x × 5y ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 16x2 + 25y2 – 20xy
APPEARS IN
संबंधित प्रश्न
Show that `(4pq + 3q)^2 - (4pq - 3q)^2 = 48pq^2`
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 95 × 105
Simplify the following using the identities: \[\frac{{58}^2 - {42}^2}{16}\]
Find the value of x, if 4x = (52)2 − (48)2.
Find the following product: \[\left( x + \frac{1}{5} \right)(x + 5)\]
Find the following product: (x2 + 4) (x2 + 9)
Evaluate the following: 102 × 106
Using algebraic identity, find the coefficients of x2, x and constant term without actual expansion
(x + 5)(x + 6)(x + 7)
Expand the following, using suitable identities.
`(4/5p + 5/3q)^2`
Using suitable identities, evaluate the following.
(995)2
