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:
(2x – y + z)2
Expand the following, using suitable identity:
(3a – 7b – c)2
Write the following cube in expanded form:
(2x + 1)3
if `x + 1/x = 11`, find the value of `x^2 + 1/x^2`
Simplify the expression:
`(x + y + z)^2 + (x + y/2 + 2/3)^2 - (x/2 + y/3 + z/4)^2`
Find the following product:
(4x − 3y + 2z) (16x2 + 9y2 + 4z2 + 12xy + 6yz − 8zx)
If a + b + c = 9 and ab + bc + ca = 23, then a2 + b2 + c2 =
Find the square of : 3a + 7b
Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" + (1)/"a"`
