Advertisements
Advertisements
प्रश्न
Evaluate: `(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
बेरीज
Advertisements
उत्तर
`(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
`=(4/7"a")^2-(3/4"b")^2` ......[ ∵ (a − b) (a + b) = a2b2]
`=16/49"a"^2-9/16"b"^2`
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
(2x – y + z)2
Expand the following, using suitable identity:
(–2x + 3y + 2z)2
Evaluate the following using identities:
(399)2
If `x^4 + 1/x^4 = 194, "find" x^3 + 1/x^3`
75 × 75 + 2 × 75 × 25 + 25 × 25 is equal to
Use the direct method to evaluate the following products:
(a – 8) (a + 2)
Simplify by using formula :
(5x - 9) (5x + 9)
If `"p" + (1)/"p" = 6`; find : `"p"^2 + (1)/"p"^2`
Factorise the following:
25x2 + 16y2 + 4z2 – 40xy + 16yz – 20xz
Without actually calculating the cubes, find the value of:
`(1/2)^3 + (1/3)^3 - (5/6)^3`
