Tyjanae Tyjanae

23-07-2015
Mathematics

contestada

Find the product mentally.

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

A: 4j2 + 49
B: 4j2 - 49
C: 2j2 - 28j - 49

Respuesta :

Аноним Аноним

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

10-07-2019

Answer:

B

Step-by-step explanation:

2j*2j=4j^2

7*-7=-49

Answer Link

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