Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate the following products :
(3x – 2y) (2x + y)
मूल्यांकन
Advertisements
उत्तर
(3x – 2y) (2x + y) = (3x × 2x) + (3x × y) + (−2y × 2x) + (−2y × y)
= 6x2 + 3xy − 4xy − 2y2
= 6x2 − xy − 2y2
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
(3a – 7b – c)2
Factorise the following:
8a3 + b3 + 12a2b + 6ab2
Evaluate the following using identities:
(399)2
if `x + 1/x = 11`, find the value of `x^2 + 1/x^2`
Simplify the following expressions:
`(x + y - 2z)^2 - x^2 - y^2 - 3z^2 +4xy`
If 3x + 4y = 16 and xy = 4, find the value of 9x2 + 16y2.
Use the direct method to evaluate :
(xy+4) (xy−4)
Expand the following:
(3x + 4) (2x - 1)
Simplify:
(x + y - z)2 + (x - y + z)2
Prove that (a + b + c)3 – a3 – b3 – c3 = 3(a + b)(b + c)(c + a).
