Question

23. What is the solution set of the equation

x²-3x - 10 = 0
(1) {5,-2}
(2){-5,-2}
(3) { 5,2}
(4) {-5,2}

Answer 1

Explanation:

x²-3x - 10 = 0

x² -5x + 2x - 10 = 0

(x² -5x)+ (2x - 10) = 0

x(x - 5) +2(x - 5) = 0

(x + 2) (x - 5) = 0

x +2 = 0

x = -2

OR

x -5 = 0

x = 5

hence ans is, (1) {5,-2}