Advertisements
Advertisements
Question
Evaluate: `(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
Sum
Advertisements
Solution
`(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
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Verify that `x^3+y^3+z^3-3xyz=1/2(x+y+z)[(x-y)^2+(y-z)^2+(z-x)^2]`
Write in the expanded form:
`(2 + x - 2y)^2`
Evaluate of the following:
1043 + 963
If a − b = −8 and ab = −12, then a3 − b3 =
Use the direct method to evaluate the following products :
(y + 5)(y – 3)
Expand the following:
(x - 5) (x - 4)
Simplify by using formula :
`("a" + 2/"a" - 1) ("a" - 2/"a" - 1)`
Simplify:
(3a - 7b + 3)(3a - 7b + 5)
Expand the following:
(–x + 2y – 3z)2
Factorise the following:
25x2 + 16y2 + 4z2 – 40xy + 16yz – 20xz
