Advertisements
Advertisements
प्रश्न
Find the value of `(6.25 xx 6.25 - 1.75 xx 1.75)/(4.5)`
Advertisements
उत्तर
We have,
`(6.25 xx 6.25 - 1.75 xx 1.75)/4.5`
= `((6.25)^2 - (1.75)^2)/4.5`
= `((6.25 + 1.75)(6.25 - 1.75))/4.5` ...[Using the identity, a2 – b2 = (a + b)(a – b)]
= `(8 xx 4.5)/4.5`
= 8
APPEARS IN
संबंधित प्रश्न
Expand: (3x + 4y)(3x - 4y)
The product of (x + 5) and (x – 5) is ____________
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
25a2 – 49b2
The value of p for 512 – 492 = 100p is 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).
4x2 – 25y2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
p5 – 16p
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
16x4 – 81
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
16x4 – 625y4
Factorise the expression and divide them as directed:
(x4 – 16) ÷ x3 + 2x2 + 4x + 8
