Question

3. Find the roots of the quadratic equation
x² – 3x - 10 = 0​

Answer 1

Answer:

x²-3x-10=0

x²-5x+2x-10=0

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

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

x=5,-2

Answer 2

x² - 3x - 10 = 0

=> x² + 2x - 5x - 10 = 0

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

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

x - 5 = 0

=> x = 5

x + 2 = 0

=> x = -2

Roots of equation : -2, 5.