Advertisements
Advertisements
Question
Simplify:
(2x - 4y + 7)(2x + 4y + 7)
Sum
Advertisements
Solution
(2x - 4y + 7)(2x + 4y + 7)
= (2x + 7 - 4y)(2x + 7 + 4y)
= (2x + 7)2 - (4y)2
= 4x2 + 2(2x)(7) + 72 - 16y2
= 4x2 - 16y2 + 28x + 49.
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Expand the following, using suitable identity:
`[1/4a-1/2b+1]^2`
Evaluate the following using identities:
`(2x+ 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:
\[\left( \frac{3}{x} - 2 x^2 \right) \left( \frac{9}{x^2} + 4 x^4 - 6x \right)\]
If a + b + c = 9 and ab +bc + ca = 26, find the value of a3 + b3+ c3 − 3abc
If \[3x + \frac{2}{x} = 7\] , then \[\left( 9 x^2 - \frac{4}{x^2} \right) =\]
If a + b = 7 and ab = 10; find a - b.
Simplify by using formula :
(5x - 9) (5x + 9)
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" + (1)/"a"`
Simplify:
(2x + y)(4x2 - 2xy + y2)
