Question

13.The solution of the equation 3x + 7 = – 20 is


14.The solution of the equation 3x + 5 = 0 is


15.Solving the equation 4c = 16​

Answer 1

Answer:

Step-by-step explanation:

comparing 3x²-4c+a = 0 with ax²+bx+c = 0

a = 3 , b = -4 ,c = a

the roots are equal

b²-4ac = 0

(-4)²-4×3×a = 0

16 - 12a = 0

-12a = 0 - 16

-12a = -16

-a = -16/12

-a = -4/3

a = 4/3

Answer 2

Step-by-step explanation:

13. 3x+7= - 20

3x= - 20-7

3x = - 27

X = - 9

14. 3x +5=0

3x = - 5

X = - 5/3

15. 4c = 16

C= 16/4

C = 4