How to find x? If y=x^2-4x
1 Answer
May 18, 2017
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