Question

(3x + 7) (3x - 3) simply​

Answer 1

Step-by-step explanation:

3x+7= 0

3x=-7

X=-7/3

3x-3=0

3x=3

x=1

therefore x= 1, -7/3

Answer 2

Answer:

9x² + 12x - 21

Step-by-step explanation:

( 3x + 7 ) ( 3x - 3 )

Formula : -

x² + ( a + b )x + ab

Here,

x = 3x

a = 7

b = - 3

( 3x + 7 ) ( 3x - 3 )

= ( 3x )² + ( 7 + ( - 3 ) ) ( 3x ) + 7 ( - 3 )

= 9x² + ( 7 - 3 ) ( 3x ) + ( - 21 )

= 9x² + 4 ( 3x ) - 21

= 9x² + 12x - 21