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
Factorise: 4x2 – 9y2
Simplify (5x – 3y)2 – (5x + 3y)2
672 – 372 = (67 – 37) × ______ = ______.
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).
`(4x^2)/9 - (9y^2)/16`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`(x^3y)/9 - (xy^3)/16`
Factorise the expression and divide them as directed:
(3x2 – 48) ÷ (x – 4)
Factorise the expression and divide them as directed:
(3x4 – 1875) ÷ (3x2 – 75)
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?
Verify the following:
(m + n)(m2 – mn + n2) = m3 + n3
