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Find the sum of the roots of the quadratic equation​x2+19x+60=0x^2 + 19x + 60 = 0x2+19x+60=0​​
Question

Find the sum of the roots of the quadratic equation

x2+19x+60=0x^2 + 19x + 60 = 0​​

A.

-19

B.

19

C.

119\frac1{19}​​

D.

1960\frac{-19}{60}​​

Correct option is A

Given:

Given equation =x2+19x+60=0 x^2 + 19x + 60 = 0​​

Formula Used:

For finding the roots we use:

Quadratic formula :x=b±b24ac2ax =\frac{ -b \pm \sqrt{b^2 - 4ac}}{2a}​​

Solution:

Given equation =x2+19x+60=0 x^2 + 19x + 60 = 0​​

x=(19)±(19)24(1)(60)2(1)x =\frac{ -(19) \pm \sqrt{(19)^2 - 4(1)(60)}}{2(1)}​​

x=(19)±3612402x =\frac{ -(19) \pm \sqrt{361 - 240}}{2}​​

x=(19)±1212x =\frac{ -(19) \pm \sqrt{121}}{2}​​

x=19+112 or x =19112x= \frac{-19 + 11}{2} \text { or x } = \frac{-19 -11}{2}​​

x =-4 or x = -15

Sum of roots = -4 + (-15) = -19

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