Question

solve by formula method if equations is 5xsquare-22x-15=0​

Answer 1

Answer:

Solution

By using middle term split method,

5x

2

−22x−15=0

⇒5x

2

−25x+3x−15=0

⇒5x(x−5)+3(x−5)=0

⇒(x−5)(5x+3)=0

Either x−5=0⇒x=5 or 5x+3=0⇒x=−

5

3

Answer 2

Answer:

The roots of the equation are X=5 or X= -3/5

Step-by-step explanation:

Given : 5x² - 22x - 15 = 0

Solution : The given equation is in the form ax² + bx +c = 0

                 a=5, b=-22 and c = -15

∴ Roots of quadratic equation = (-b±√(b²-4ac))/2a

                                                  = (-(-22)±√((-22)²-4x5x-15))/2x5

                                                 = (22±√(484+300))/10

                                                 = (22±√784)/10

                                                 = (22+28)/10 or (22-28)/10

                                                 = 50/10 or -6/10

                                                = 5 or -3/5