Advertisements
Advertisements
प्रश्न
Expand the following:
(4a – b + 2c)2
Advertisements
उत्तर
(4a – b + 2c)2
= (4a)2 + (–b)2 + (2c)2 + 2(4a)(–b) + 2(–b)(2c) + 2(2c)(4a) ...[Using identity, (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca]
= 16a2 + b2 + 4c2 – 8ab – 4bc + 16ac
APPEARS IN
संबंधित प्रश्न
Find the cube of the following binomials expression :
\[4 - \frac{1}{3x}\]
Evaluate of the following:
(99)3
Evaluate of the following:
1043 + 963
Find the following product:
Evaluate:
253 − 753 + 503
If \[x + \frac{1}{x}\] 4, then \[x^4 + \frac{1}{x^4} =\]
Evalute : `((2x)/7 - (7y)/4)^2`
If a + b = 7 and ab = 10; find a - b.
Use the direct method to evaluate :
`(3/5"a"+1/2)(3/5"a"-1/2)`
Evaluate: `(2"x"-3/5)(2"x"+3/5)`
Expand the following:
(x - 3y - 2z)2
If x + y = 9, xy = 20
find: x - y
If `"a" - 1/"a" = 10;` find `"a" + 1/"a"`
If m - n = 0.9 and mn = 0.36, find:
m + n
If x + y = 1 and xy = -12; find:
x2 - y2.
If 2x + 3y = 10 and xy = 5; find the value of 4x2 + 9y2
Simplify:
(3x + 5y + 2z)(3x - 5y + 2z)
If `49x^2 - b = (7x + 1/2)(7x - 1/2)`, then the value of b is ______.
Find the following product:
`(x/2 + 2y)(x^2/4 - xy + 4y^2)`
