Advertisements
Advertisements
प्रश्न
Simplify:
(7a +5b)2 - (7a - 5b)2
बेरीज
उत्तर
(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.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
If 3x - 7y = 10 and xy = -1, find the value of `9x^2 + 49y^2`
If 3x − 2y = 11 and xy = 12, find the value of 27x3 − 8y3
Evaluate of the following:
1043 + 963
If \[x + \frac{1}{x} = 3\], calculate \[x^2 + \frac{1}{x^2}, x^3 + \frac{1}{x^3}\] and \[x^4 + \frac{1}{x^4}\]
If x + y + z = 8 and xy +yz +zx = 20, find the value of x3 + y3 + z3 −3xyz
75 × 75 + 2 × 75 × 25 + 25 × 25 is equal to
The product (x2−1) (x4 + x2 + 1) is equal to
Simplify by using formula :
(1 + a) (1 - a) (1 + a2)
If p + q = 8 and p - q = 4, find:
p2 + q2
Simplify (2x – 5y)3 – (2x + 5y)3.
