Question

bracket 5 x + 7 bracket multiply bracket 3 X + 4 bracket

Answer 1

I hope your question is ( 5x + 7 ) * ( 3x + 4 )

Answer :

( 5x + 7 ) * ( 3x + 4 )

= 15x² + 20x + 21x + 28

= 15x² + 41x + 28

Answer 2

$(5x + 7)(3x + 4) \\ 15x { }^{2} + 20x + 21x + 28 \\ 15x {}^{2} +41x + 28 = 0$