Uisng identities find : (i) 8.9²
(ii) 1.05*9.5
Answers
Answered by
2
(i)8.92= (9 - 0.1)2
= 92 - 1.8 + 0.12
= 81 - 1.8 + 0.01
= 79.21
(ii)(a-b) (a+b) = a^2 - b^2
so 1.05 = 1 + 0.5 and 9.5 = 1 - 0.5
1.05 * 9.5 = (1 + 0.5) (1 - 0.5) = (1)^2 - (0.5)^2 = 1-(0.25) = 0.75
Hope you got it!!!!!
= 92 - 1.8 + 0.12
= 81 - 1.8 + 0.01
= 79.21
(ii)(a-b) (a+b) = a^2 - b^2
so 1.05 = 1 + 0.5 and 9.5 = 1 - 0.5
1.05 * 9.5 = (1 + 0.5) (1 - 0.5) = (1)^2 - (0.5)^2 = 1-(0.25) = 0.75
Hope you got it!!!!!
cuppycake31:
hey there
Similar questions