Advertisements
Advertisements
प्रश्न
Find the value of a, if 9a = 762 – 672
Advertisements
उत्तर
We have,
9a = 762 – 672
⇒ 9a = (76 + 67)(76 – 67) ...[Using the identity, a2 – b2 = (a + b)(a – b)]
⇒ 9a = 143 × 9
⇒ `a = (143 xx 9)/9`
⇒ a = 143
APPEARS IN
संबंधित प्रश्न
Expand: 102 x 98
Expand 4p2 – 25q2
The product of (x + 5) and (x – 5) is ____________
Using the identity (a + b)(a – b) = a2 – b2, find the following product
(6x + 7y)(6x – 7y)
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
9 – 4y2
Using suitable identities, evaluate the following.
(69.3)2 – (30.7)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
3a2b3 – 27a4b
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
25ax2 – 25a
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
y4 – 625
Factorise the expression and divide them as directed:
(2x3 – 12x2 + 16x) ÷ (x – 2)(x – 4)
