Question

the
value of (3a+7b)^2-(3a-7b)^2 is ​

Answer 1

Answer:

$hii...$

$here \: is \: your \: answer$

ǫᴜᴇsᴛɪᴏɴ

the value of (3a+7b)²-(3a-7b)² is

sᴏʟᴜᴛɪᴏɴ

first expand the term,

by using this identity (a+b) = a² + b² + 2 ab

and (a - b) = a² +b² - 2ab

Then,

(3a + 7b)²

= (3a)² + (7b)² + 2 ×3a × 7b

= 9a² + 49b² + 42ab

Now , expand 2nd term

(3a - 7b)

= (3a)² + (7b)² - 2 × 3a × 7b

= 9a² + 49b² - 42ab

A/q,

(3a + 7b)² - (3a - 7b)²

= (9a² + 49b² + 42ab) - (9a² + 49b² - 42ab)

= 9a² + 49b² + 42ab - 9a² - 49 b² + 42 ab

= 42ab + 42ab

= 84ab

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ

ғᴏʟʟᴏᴡ ᴍᴇ

Answer 2

Answer:

okay its clear to you

hope its helpful.....

Step-by-step explanation:

plz mark me at brainlist..

Answer 3

Answer:

okay its clear to you

hope its helpful.....

Step-by-step explanation:

plz mark me at brainlist..