Question

please fast answer!!!​

Answer 1

Answer:

question 12

3x+ 6x = 180 '

9x = 180

x= 180

9

x= 20 '

Therefore x= 20'

question 13

(x+3)(x+5)

Using identity

x^2+(3+5)x+3×5

x^2+8x+15

Step-by-step explanation:

this is your answer hope this helps you

Answer 2

Step-by-step explanation:

12) 6x + 3x = 180 [linear pair]

9x = 180

x = 180/9 = 20°

13) (x+3)(x+5) = x²+ (3+5)x + 3x5

x²+8x + 15

x² + 3x + 5x + 15

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

(x+5)(x+3)

x = -5                 x=-3

hope it helped! please mark as brainliest