Question

4. Using expansion of (a + b) or (a - b) find the
value of the following.
(i) (98)²
(ii) (104)²
(iii) (7.8)²
(iv) (30.1)²
(v) (403)²
(vi) (9.5)²​

Answer 1

Answer:

I think so...

Step-by-step explanation:

1 ) (100-2)^2 = 9604

2) (100 + 4)^2 = 10816

3) ( 10- 2.2 )^2 = 60.84

4) (30 + 0.1)^2 = 906.01

5) (400 + 3)^2 = 162409

6) ( 10 - 0 .5 )^2 = 90.25

Answer 2

(100-2)2

10000+4-400

9604

(100+4)2

10000+16+800

10816

(80/10-2/10)2

6400/100+4/100+1600/100

8004/100

80.04q

(300/10+1/10)2

90000/100+1/100+600/100

90601/100

906.01

(400+3)2

1600+9+2400

4009

(100/10-5/10)2

10000/100+25/100+1000/100

11025/100

110.25