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3 years ago

What must be multiplied to 3x + 7y to get 9x² - 49y²?help.

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

6 0

Answer:

square the whole equation

Step-by-step explanation:

so, it will change from (3x + 7y)² to 9x² - 49y²

I hope this helps a little bit.

lukranit [14]3 years ago

6 0

Answer:

(3x - 7y)

Step-by-step explanation:

 we know that 

 

 .. (a + b) (a - b) = (a^2 - b^2)

 => (a + b) = (3x + 7y)

=>. (a^2 - b^2) = (9x^2 - 49y^2)

 => so, (a - b).= (3x - 7y)

hope it helps

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What must be multiplied to 3x + 7y to get 9x² - 49y²?help.​

What must be multiplied to 3x + 7y to get 9x² - 49y²?help.