Advertisements
Advertisements
प्रश्न
If x + y = 1 and xy = -12; find:
x2 - y2.
बेरीज
Advertisements
उत्तर
x2 - y2
= (x + y) (x - y)
= (1) (±7)
= ±7.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
`[1/4a-1/2b+1]^2`
Evaluate of the following:
(103)3
Find the value of 27x3 + 8y3, if 3x + 2y = 14 and xy = 8
Find the following product:
(3x + 2y) (9x2 − 6xy + 4y2)
Find the following product:
\[\left( \frac{2}{x} + 3x \right) \left( \frac{4}{x^2} + 9 x^2 - 6 \right)\]
Use the direct method to evaluate :
(0.5−2a) (0.5+2a)
Evaluate: (9 − y) (7 + y)
Expand the following:
(2p - 3q)2
Simplify:
`(x - 1/x)(x^2 + 1 + 1/x^2)`
Factorise the following:
9y2 – 66yz + 121z2
