Question

please solve this question​

Answer 1

Step-by-step explanation:

3x^2+15x+15x+75

3x(x+5)+15(x+5)

(3x+15)(x+5)

3x+15=0

3x=-15

x=-5

x+5=0

x=-5

Answer 2

3x² + 30x + 75

3(x² + 10x + 25) { 3 is common in all three term }

= 3( x² + 5x + 5x + 25 )

= 3( x ( x + 5) + 5 ( x + 5)

= 3( (x + 5) + ( x + 5)

= 3 (x + 5)²