Math tricks that'll make your calculation 10X faster #1

Vedic Maths: Algebra trick

If you are ever presented with an equation formatted as such: (x+a)(x+b)=(x+c)(x+d). There's a super simple and shocking way to find the value of x. Just apply the formula shown below:

x=(cd-ab)/(a+b-c-d)

This equation does work! Look at the following example:

Fast way:

(x+1)(x+3)=(x-5)(x-4)

a=1, b=3, c=-5, and d=-4

Replace it into the equation:

x=((-5)(-4)-(1)(3))/(1+3-(-5)-(-4)

x=(20-3)/(13)

x=17/13

Normal Way:

(x+1)(x+3)=(x-5)(x-4)

x^2+4x+3=x^2-9x+20

Subtract x^2 from both sides

4x+3=-9x+20

13x=17

x=17/13

Tell me in the comments which one you think is faster!