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

1 Answer
Jim G.
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#

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