Advertisements
Advertisements
प्रश्न
Use a suitable identity to get the following products
(2a − 7) (2a − 7)
Advertisements
उत्तर
(2a − 7) (2a − 7) = (2a − 7)2
= (2a)2 − 2(2a) (7) + (7)2 [(a − b)2 = a2 − 2ab + b2]
= 4a2 − 28a + 49
संबंधित प्रश्न
Use an expansion formula to find the value.
(97)2
`(("a" + "b")("a"^3 - "b"^3))/(("a"^2 - "b"^2))` = ___________
Factorise the following expressions
x2 + 14x + 49
Factorise the following using suitable identity
36m2 + 60m + 25
Show that (x + 2y)2 – (x – 2y)2 = 8xy
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 4x + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
a2x2 + 2ax + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
a2x2 + 2abxy + b2y2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
9x2 + 24x + 16
If a2 + b2 = 74 and ab = 35, then find a + b.
