Advertisements
Advertisements
Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
y4 – 625
Advertisements
Solution
We have,
y4 – 625 = (y2)2 – (25)2
= (y2 + 25)(y2 – 25)
= (y2 + 25)(y2 – 52)
= (y2 + 25)(y + 5)(y – 5)
APPEARS IN
RELATED QUESTIONS
(5 + 20)(–20 – 5) = ?
Using identity, find the value of (1.9) × (2.1)
Factorise: 4x2 – 9y2
Find the value of (x – y)(x + y)(x2 + y2)
Using suitable identities, evaluate the following.
9.8 × 10.2
Using suitable identities, evaluate the following.
(9.7)2 – (0.3)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
25ax2 – 25a
Factorise the expression and divide them as directed:
(3x2 – 48) ÷ (x – 4)
The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30 units?
The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. `(pi = 22/7)`
