How to find x? If y=x^2-4x

1 Answer
May 18, 2017

x=0" or " x=4

Explanation:

" to solve equate to zero and factorise"

rArrx^2-4x=0

rArrx(x-4)=0larrcolor(blue)" common factor of x"

"now equate each factor to zero"

"that is " x=0" or " x-4=0

rArrx=0

rArrx-4=0rArrx=4