Maths - Factorising

2x^ +5x -3 = 0

The answer says that it is (2x-1) (x+3). Howww??? What two numbers multiply to -3 and add to +5. Help plsss

2x^ +5x -3 = 0

The answer says that it is (2x-1) (x+3). Howww??? What two numbers multiply to -3 and add to +5. Help plsss

There's a difference between $x^2 + 5x - 3$ and $2x^2 + 5x - 3$.

There's a difference between $x^2 + 5x - 3$ and $2x^2 + 5x - 3$.

so for any quadratic equation ax^2 + bx + c

the numbers that go in the brackets must add to b, and multiply to give ac.

so when a=1
its just 2 numbers that multiply to give c
but when a=2 for example its numbers that multiply to give ac which will be 2 x c

https://www.youtube.com/watch?v=_SkmmXiUOv0

have a watch of this for a more detailed explanation