Question

(3x + 4 ) ( 3x - 5 )
using the identity ,
(x + a ) ( x + b ) = x² + ( a + b )x + ab
pls explain it properly , I will mark you as brainliest ​

Answer 1

Answer:

(3x)²+(4+(-5))3x + 4×(-5)

after solving ....equation

9x²-3x-20

9x²-12x +15x-20 ( by splitting the middle term

3x(3x-4)+5(3x-4)

(3x - 4)(3x+5)

x=4/3 ,x=-5/3

hope it will help you