Question

15. Find the solution of: √(2x + 9) + x = 13 (1) { 13,-9.} (2) (9,- 13) (3) {8} {13/2,9)​

Answer 1

Answer:

2x+9=(13-x)^2=169+x^2-26x

x^2-28x+160=0

x^2-20x-8x+160=0

x(x-20)-8(x-20)=0

(x-8)(x-20)=0

x=8 and x=20