Advertisements
Advertisements
Question
Simplify:
(7a +5b)2 - (7a - 5b)2
Solution
(7a + 5b)2 - (7a - 5b)2
= (7a)2 + (5b)2 + 2(7a)(5b) - [(7a)2 + (5b)2 - 2(7a)(5b)]
= 49a2 + 25b2 + 70ab - [49a2 + 25b2 - 70ab]
= 70a + 70ab
= 140ab.
APPEARS IN
RELATED QUESTIONS
Write the following cube in expanded form:
`[3/2x+1]^3`
Evaluate the following using suitable identity:
(99)3
Evaluate the following using identities:
(2x + y) (2x − y)
Write the expanded form:
`(-3x + y + z)^2`
Simplify `(a + b + c)^2 + (a - b + c)^2`
If \[x - \frac{1}{x} = - 1\] find the value of \[x^2 + \frac{1}{x^2}\]
Find the following product:
Find the following product:
(4x − 3y + 2z) (16x2 + 9y2 + 4z2 + 12xy + 6yz − 8zx)
The number x is 2 more than the number y. If the sum of the squares of x and y is 34, then find the product of x and y.
If `x + (1)/x = 3`; find `x^4 + (1)/x^4`
