Find the exact solution to the equation .
Ever wondered why (a+b)(a-b)=a^2-b^2? The videos below will reveal to you why we accept this fact. Enjoy!
1) Why (a+b)(a+b)=a^2+2ab+b^2
2) Why (a+b)(a-b)=a^2-b^2
Learn how to come up with the quadratic formula from scratch. Watch the video below…
Learn why sin(A+B)=sinAcosB+cosAsinB with this elegant proof…
Like this proof? Why not check out this page…
Learn how to come up with Pythagoras’ famous formula – from absolute scratch…
To see the full explanation in writing, please visit the link below:
Find out how to come up with the Trapezium Rule formula from scratch.
1) Derive the formula for the area of trapeziums:
2) Use the area of trapeziums formula to come up with the Trapezium Rule formula: