Question

1. Using identity find
(a) ( 2x + 3y )2

(b) 983 2
- 172

2. 72% of 25 students are interested in mathematics. How many are not
interested in mathematics?
3. Using identities evaluate
(a) 99 2 (b) 297 X 303
4. Add p (p – q), q (q – r), and r (r – p)
5. Sohan bought a second-hand refrigerator for ₹ 2,500, then spent ₹500
on its repairs and sold it for ₹3,300. Find his loss or gain percent.
16. Simplify (x +y ) ( x2 – xy + y2
)

17. Calculate the amount and Compound interest on ₹10,800 for 2 years at
12 1
2
% per annum compounded annually.
who gives full answer they will be brainlist

Answer 1

1Q (2x+3y)2

4x+6y

Q2 means 28%=25students

means78%=___students

= 78x25/28

=64

Q4 a) p(p-q)

p²-pq

b)q(q-r)

q²-rq

c)r(r-p,)

r²-pr

Q5

soha bought second hand refrigerator fir 2500 ge spend fir repair 500 (2500+500=3000)

the he sold this refrigerator for 3300

profit =s.p-c.p

= 3300-3000

=300 profit

profit percentage = profit x100/c.p

=300x100/3000

=30%