Advertisements
Advertisements
प्रश्न
If a + b = 10 and ab = 18, find the value of a2 + b2
बेरीज
Advertisements
उत्तर
We have (a + b)2 = a2 + 2ab + b2
(a + b)2 = a2 + b2 + 2ab
given a + b = 0 and ab = 18
102 = a2 + b2 + 2(18)
100 = a2 + b2 + 36
100 – 36 = a2 + b2
a2 + b2 = 64
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Using identities, evaluate 8.92
Using a2 − b2 = (a + b) (a − b), find 512 − 492
Expand `("x"+1/2)^2`
Which of the options given below is the square of the binomial `(8-1/"x")`?
Of which of the binomials given below is m2n2 + 14mnpq + 49p2q2 the expansion?
Expand the following square, using suitable identities
(2x + 5)2
Factorise the following using suitable identity
y2 + 20y + 100
The sum of areas of two squares with sides 4a and 4b is ______.
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
16x2 + 40x + 25
The area of a square is given by 4x2 + 12xy + 9y2. Find the side of the square.
