Question

و و که
4. What is the sum of the root of quadant
equation x² - 2x- 15=0​

Answer 1

Answer:

Sum of roots of the equation is 2.

Step-by-step explanation:

${x}^{2} - 2x - 15 = 0$

$sum \: of \: roots \: = \frac{ - (coefficient \: of \: x)}{coefficient \: of \: {x}^{2} } \\ = \frac{ - ( - 2)}{1} \\ = 2$

Answer 2

Answer:

x²-2x-15

x²-5x+3x-15

x(x-5)+3(x-5)

(x-5)(x+3)

x-5=0,x+3=0

x=5,x= -3