Advertisements
Advertisements
प्रश्न
Use the formula to multiply the following.
`("x"/5+6)("x"/5-6)`
उत्तर
It is known that, (a + b) (a − b) = a2 − b2.
`("x"/5+6)("x"/5-6)`
= `("x"/5)^2-(6)^2`
= `"x"^2/25-36`
संबंधित प्रश्न
Use a suitable identity to get the following products.
`(x/2 + (3y)/4)(x/2 + (3y)/4)`
Simplify (2.5p − 1.5q)2 − (1.5p − 2.5q)2
Using identities, evaluate (5.2)2
Use an expansion formula to find the value.
(97)2
Use the formula to find the value.
97 × 103
The sum of areas of two squares with sides 4a and 4b is ______.
The difference of the squares of two consecutive numbers is their sum.
The area of a rectangle is x2 + 7x + 12. If its breadth is (x + 3), then find its length.
Verify the following:
(7p – 13q)2 + 364pq = (7p + 13q)2
Take suitable number of cards given in the adjoining diagram [G(x × x) representing x2, R(x × 1) representing x and Y(1 × 1) representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles:
- 2x2 + 6x + 4
- x2 + 4x + 4.
Factorise 2x2 + 6x + 4 by using the figure.
Calculate the area of figure.
