Question

1) Solve x + 2y = 5; X-5y =
2) Solve quadratic equation by factorization method.
x- 7x + 12 = 0
Find 19th term fo following A.P. 7, 13, 19, 25,​

Answer 1

Step-by-step explanation:

2. x²-7x+12

x²-4x-3x+12

x(x-4)-3(x-4)

(x-4) (x-3)

x= 4 or x= 3

3. a= 7

d= 13-7= 6

n= 19

an= a+(n-1) d

= 7+(19-1)6

= 7+(18)6

= 108+6

= 114