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#