Math, asked by shahid676, 11 months ago

use the product (a+b) (a-b)=a2-b2 to evaluate 21×19

Answers

Answered by suramanksc2017

7

(20+1) (20-1)

=20² - 1²

=400-1

=399

Hope it helps...

suramanksc2017: you can follow me whenever in need in future

shahid676: wrong h

suramanksc2017: my ans is correct

suramanksc2017: bhai calculator use karke bhi dekh sakta hai

Answered by prachi7255

0

21^2-19^2

441-361

(441+361)(441-361)

hope it help

shahid676: wrong

prachi7255: which is correct ans

Previous Question

Next Question

Similar questions

English, 6 months ago

Your school club is conducting interview for its Annual Admission. As the Secretary of the club write a notice notifying all interested to come for the interview. Give details about the club the date of the interview, the time and the venue.

Chemistry, 6 months ago

the rate of diffusion of hydrogen gas is times that of oxygen gas...

History, 6 months ago

with reference to reformation mention the practices of the church that caused the satisfaction among the people...

Science, 11 months ago

Fill in the blanks with suitable words given the help box. Non-biodegradable ,Water bottles, Rayon, Acrylic ,PVC, Monomers, PET, Baxelite ........... is a synthetic fibre having wool-like feel. The small units that join to make a polymer are called One of the most common forms of polyester is ........ which is used for making ...... is a thermoplastic whereas ............ is a thermosetting...

Accountancy, 11 months ago

Kindly answer me From 11th stndrd Accountancy ...

Social Sciences, 1 year ago

Name any two states which have seen a significient decline in poverty...

History, 1 year ago

List one rajput clans who refused to accept the mughal authority for a long time...

Math, 1 year ago

If three quadratic equation have 1 common root.then condition...