radomes.openskiesproject.org
Tyjanae Tyjanae
  • 23-07-2015
  • Mathematics
Answered

Find the product mentally.


(2j + 7)(2j - 7)


A: 4j2 + 49

B: 4j2 - 49

C: 2j2 - 28j - 49

Verified Answer :

Anonymous Anonymous
  • 23-07-2015

(2j+7)(2j−7)

=(2j+7)(2j+−7)

=(2j)(2j)+(2j)(−7)+(7)(2j)+(7)(−7)

=4j2−14j+14j−49

=4j2−49

Answer Link
averyverydumbguy
averyverydumbguy averyverydumbguy
  • 10-07-2019

Answer:

B

Step-by-step explanation:

2j2j=4j^2

7-7=-49

Answer Link

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