Math, asked by hariprasadsahu1979, 6 months ago

he guys answer fast
3 {x}^{2}  + 7b \: from \: 3 {x}^{2}  - 7b

Answers

Answered by STarAK
28

⋆ANSWER☟ 

(3x2+ 7) ( 3x2 - 7)

=>( 3x2)2 - (7)2

=> 9x2 - 49

\implies{\rm }

\implies{\rm }\large\bold{\</em><em>9</em><em>x</em><em>2</em><em> </em><em>-</em><em> </em><em>4</em><em>9</em><em> </em><em>ans</em><em>.</em><em>{Verified }}

Answered by naina0529
2

Answer:

9 {x}^{4}  - 49 {b}^{2}

  \mathcal \green{step  - by - step \: explanation}

(3 {x}^{2}  + 7b)(3 {x}^{2}  - b)

 =  ({3 {x}^{2} })^{2}  -  ({7b)}^{2}

 = 9 {x}^{2}  - 49 {b}^{2}

#hence, proved

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