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
Evaluate the following, using suitable identity
990 × 1010
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
z2 – 16
If X = a2 – 1 and Y = 1 – b2, then find X + Y and factorize the same
Find the value of (x – y)(x + y)(x2 + y2)
Using suitable identities, evaluate the following.
(9.7)2 – (0.3)2
Using suitable identities, evaluate the following.
(729)2 – (271)2
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).
1331x3y – 11y3x
Factorise the expression and divide them as directed:
(x4 – 16) ÷ x3 + 2x2 + 4x + 8
Verify the following:
`((3p)/7 + 7/(6p))^2 - (3/7p + 7/(6p))^2 = 2`
