Advertisements
Advertisements
प्रश्न
Evaluate: (5xy − 7) (7xy + 9)
बेरीज
Advertisements
उत्तर
(5xy − 7) (7xy + 9) = 5xy (7xy + 9) − 7 (7xy + 9)
= 35x2y2 + 45xy − 49xy − 63
= 35x2y2 − 4xy − 63
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Use suitable identity to find the following product:
(3x + 4) (3x – 5)
Factorise the following:
8a3 – b3 – 12a2b + 6ab2
If a + b + c = 9 and ab + bc + ca = 23, find the value of a2 + b2 + c2.
If \[x^2 + \frac{1}{x^2} = 98\] ,find the value of \[x^3 + \frac{1}{x^3}\]
If x + y + z = 8 and xy +yz +zx = 20, find the value of x3 + y3 + z3 −3xyz
If \[x + \frac{1}{x} = 3\] then \[x^6 + \frac{1}{x^6}\] =
If 3x + 4y = 16 and xy = 4, find the value of 9x2 + 16y2.
If `"a" - 1/"a" = 10;` find `"a" + 1/"a"`
If m - n = 0.9 and mn = 0.36, find:
m + n
Factorise the following:
25x2 + 16y2 + 4z2 – 40xy + 16yz – 20xz
