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प्रश्न
Use the formula to multiply the following.
(3x − 5) (3x + 5)
उत्तर
It is known that, (a + b) (a − b) = a2 − b2.
(3x − 5) (3x + 5)
= (3x)2 − (5)2
= 9x2 − 25
संबंधित प्रश्न
Use a suitable identity to get the following products.
(7a − 9b) (7a − 9b)
Simplify (2.5p − 1.5q)2 − (1.5p − 2.5q)2
Use a formula to multiply of (x - 5)(x + 5).
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 6x + 9
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.
9x2 + 30x + 25
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
a2x3 + 2abx2 + b2x
The area of a square is 9x2 + 24xy + 16y2. Find the side of the square.
Verify the following:
(a + b)(a + b)(a + b) = a3 + 3a2b + 3ab2 + b3
Factorise p4 + q4 + p2q2.
