90²-10² solve by using suitable identity
Answers
Answered by
3
Answer:
Using identity, (a+b) (a-b)=a^2-b^2
a=90, b=10
(90+10) (90-10)
(100) (80)
8000
Answered by
15
90²-10²
By using the identity a² – b² = (a + b)(a – b), we get :
90²-10² = (90+10)(90-10)
= 100×80
= 8000
Similar questions
Math,
5 months ago
Economy,
11 months ago
Business Studies,
11 months ago
Math,
1 year ago
Physics,
1 year ago