Question

solve the following equation using quadratic formula

15x²-7x-36=0 ​

Answer 1

Here the quadratic equation is 15x

2

−7x−36=0

⇒15x

2

−27x+20x−36

⇒3x(5x−9)+4(5x−9)

⇒(3x+4)(5x−9)

⇒3x+4=0

⇒3x=−4

⇒x=−

3

4

or

⇒5x−9=0

⇒5x=9

⇒x=

5

9

Answer 2

Answer:

$x = \frac{9}{5} .$