Question

Using identities, find the value of :
(a) 102 x 103 (b) 52 x 47
(c) 98 X 97 (d) (39)
(e) (54)?
(f) (78)?
(g) (999)
(h) (103)
(i) (7.5)

Answer 1

Answer:

a 102×103

= 10,506

B 52×47

=2,444

C 98×97

=9,506

no any more answer

Answer 2

Answer:

a. 102×103

Sol.= (x+a)(x+b)=x^2+(a+b)x+ab

(100)^2 + (2+3)100 + (2×3)

10000+(5×100)+6

10000+500+6

10,506=Answer

i. 7.5

Sol. = (a+b)^2= a^2+b^2+2ab

= (7.0)^2+(0.5)^2+2×7.0×5

= 49.0+0.25+7.00

56.25= Answe

Step-by-step explanation:

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